3-D scatter plot - MATLAB scatter3 - MathWorks France (2024)

Table of Contents
Syntax Description Vector and Matrix Data Table Data Additional Options Examples Create 3-D Scatter Plot Vary Marker Size Vary Marker Color Fill in Markers Set Marker Type Set Marker Properties Plot Data from a Table Plot Table Data with Custom Marker Sizes and Colors Specify Axes for 3-D Scatter Plot Set Scatter Series Properties Using Handle Input Arguments X — x-coordinates scalar | vector | matrix Y — y-coordinates scalar | vector | matrix Z — z-coordinates scalar | vector | matrix S — Marker size 36 (default) | numeric scalar | row or column vector | matrix | [] C — Marker color color name | RGB triplet | matrix of RGB triplets | vector of colormap indices markertype — Marker 'o' (default) | '+' | '*' | '.' | 'x' | ... 'filled' — Option to fill interior of markers 'filled' tbl — Source table table | timetable xvar — Table variables containing x-coordinatesone or more table variable indices yvar — Table variables containing y-coordinates one or more table variable indices zvar — Table variables containing z-coordinates one or more table variable indices ax — Axes object axes object Name-Value Arguments ColorVariable — Table variable containing color data table variable index Output Arguments h — Scatter object Scatter object Extended Capabilities GPU Arrays Accelerate code by running on a graphics processing unit (GPU) using Parallel Computing Toolbox™. Distributed ArraysPartition large arrays across the combined memory of your cluster using Parallel Computing Toolbox™. Version History R2022b: Plots created with tables preserve special characters in axis and legend labels R2022a: Plot multiple data sets at once using matrices R2021b: Pass tables directly to scatter3 See Also Functions Properties Topics Commande MATLAB Americas Europe Asia Pacific FAQs

3-D scatter plot

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  • 3-D scatter plot - MATLAB scatter3- MathWorks France (1)

Syntax

scatter3(X,Y,Z)

scatter3(X,Y,Z,S)

scatter3(X,Y,Z,S,C)

scatter3(___,'filled')

scatter3(___,markertype)

scatter3(tbl,xvar,yvar,zvar)

scatter3(tbl,xvar,yvar,zvar,'filled')

scatter3(ax,___)

scatter3(___,Name,Value)

h = scatter3(___)

Description

Vector and Matrix Data

example

scatter3(X,Y,Z) displays circles at the locations specified by X, Y, and Z.

  • To plot one set of coordinates, specify X, Y, and Z as vectors of equal length.

  • To plot multiple sets of coordinates on the same set of axes, specify at least one of X, Y, or Z as a matrix. (Since R2022a)

example

scatter3(X,Y,Z,S) specifies the circle sizes.

  • To vary the circle sizes, specify S as a vector.

  • To specify different sizes across multiple sets of coordinates, specify a matrix. (Since R2022a)

example

scatter3(X,Y,Z,S,C) specifies the circle colors. You can specify one color for all the circles, or you can vary the color. For example, you can plot all red circles by specifying C as "red".

example

scatter3(___,'filled') fills in the circles, using any of the input argument combinations in the previous syntaxes.

example

scatter3(___,markertype) specifies the marker type.

Table Data

example

scatter3(tbl,xvar,yvar,zvar) plots the variables xvar, yvar, and zvar from the table tbl. To plot one data set, specify one variable each for xvar, yvar, and zvar. To plot multiple data sets, specify multiple variables for at least one of those arguments. The arguments that specify multiple variables must specify the same number of variables. (Since R2021b)

example

scatter3(tbl,xvar,yvar,zvar,'filled') plots the specified variables from the table with filled circles. (Since R2021b)

Additional Options

example

scatter3(ax,___) plots into the axes specified by ax instead of into the current axes (gca). The ax option can precede any of the input argument combinations in the previous syntaxes.

example

scatter3(___,Name,Value) modifies the scatter plot using one or more name-value arguments to set properties. For example:

  • scatter3(x,y,z,'LineWidth',2) creates a scatter plot with 2-point marker outlines.

  • scatter3(tbl,'MyX','MyY','MyZ','ColorVariable','MyColors') creates a scatter plot from data in a table, and customizes the marker colors using data from the table.

For a full list of properties, see Scatter Properties.

example

h = scatter3(___) returns the Scatter object. Use h to modify properties of the scatter chart after it is created.

Examples

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Create 3-D Scatter Plot

Open Live Script

Create a 3-D scatter plot. Use sphere to define vectors x, y, and z.

figure[X,Y,Z] = sphere(16);x = [0.5*X(:); 0.75*X(:); X(:)];y = [0.5*Y(:); 0.75*Y(:); Y(:)];z = [0.5*Z(:); 0.75*Z(:); Z(:)];scatter3(x,y,z)

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Vary Marker Size

Open Live Script

Use sphere to define vectors x, y, and z.

[X,Y,Z] = sphere(16);x = [0.5*X(:); 0.75*X(:); X(:)];y = [0.5*Y(:); 0.75*Y(:); Y(:)];z = [0.5*Z(:); 0.75*Z(:); Z(:)];

Define vector s to specify the marker sizes.

S = repmat([100,50,5],numel(X),1);s = S(:);

Create a 3-D scatter plot and use view to change the angle of the axes in the figure.

figurescatter3(x,y,z,s)view(40,35)

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Corresponding entries in x, y, z, and s determine the location and size of each marker.

Vary Marker Color

Open Live Script

Use sphere to define vectors x, y, and z.

[X,Y,Z] = sphere(16);x = [0.5*X(:); 0.75*X(:); X(:)];y = [0.5*Y(:); 0.75*Y(:); Y(:)];z = [0.5*Z(:); 0.75*Z(:); Z(:)];

Define vectors s and c to specify the size and color of each marker.

Create a 3-D scatter plot and use view to change the angle of the axes in the figure.

figurescatter3(x,y,z,s,c)view(40,35)

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Corresponding entries in x, y, z, and c determine the location and color of each marker.

Fill in Markers

Open Live Script

Create vectors x and y as cosine and sine values with random noise.

z = linspace(0,4*pi,250);x = 2*cos(z) + rand(1,250);y = 2*sin(z) + rand(1,250);

Create a 3-D scatter plot and fill in the markers. Use view to change the angle of the axes in the figure.

scatter3(x,y,z,'filled')view(-30,10)

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Set Marker Type

Open Live Script

Initialize the random-number generator to make the output of rand repeatable. Define vectors x and y as cosine and sine values with random noise.

rng defaultz = linspace(0,4*pi,250);x = 2*cos(z) + rand(1,250);y = 2*sin(z) + rand(1,250);

Create a 3-D scatter plot and set the marker type. Use view to change the angle of the axes in the figure.

figurescatter3(x,y,z,'*')view(-30,10)

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Set Marker Properties

Open Live Script

Initialize the random-number generator to make the output of rand repeatable. Define vectors x and y as cosine and sine values with random noise.

rng defaultz = linspace(0,4*pi,250);x = 2*cos(z) + rand(1,250);y = 2*sin(z) + rand(1,250);

Create a 3-D scatter plot and set the marker edge color and the marker face color. Use view to change the angle of the axes in the figure.

figurescatter3(x,y,z,... 'MarkerEdgeColor','k',... 'MarkerFaceColor',[0 .75 .75])view(-30,10)

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Plot Data from a Table

Open Live Script

Since R2021b

A convenient way to plot data from a table is to pass the table to the scatter3 function and specify the variables you want to plot. For example, read patients.xls as a table tbl. Plot the relationship between the Systolic, Diastolic, and Weight variables by passing tbl as the first argument to the scatter3 function followed by the variable names. By default, the axis labels match the variable names.

tbl = readtable('patients.xls');scatter3(tbl,'Systolic','Diastolic','Weight');

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You can also plot multiple variables at the same time. For example, plot both blood pressure variables on the x-axis by specifying the xvar argument as the cell array {'Systolic','Diastolic'}. Then add a legend. The legend labels match the variable names.

scatter3(tbl,{'Systolic','Diastolic'},'Age','Weight');legend

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Plot Table Data with Custom Marker Sizes and Colors

Open Live Script

Since R2021b

One way to plot data from a table and customize the colors and marker sizes is to set the ColorVariable and SizeData properties. You can set these properties as name-value arguments when you call the scatter3 function, or you can set them on the Scatter object later.

For example, read patients.xls as a table tbl. Plot the relationship between the Systolic, Diastolic, and Weight variables with filled markers. Vary the marker colors by specifying the ColorVariable name-value argument. Return the Scatter object as s, so you can set other properties later.

tbl = readtable('patients.xls');s = scatter3(tbl,'Systolic','Diastolic','Weight','filled', ... 'ColorVariable','Diastolic');

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Change the marker sizes to 100 points by setting the SizeData property. Then add a colorbar.

s.SizeData = 100;colorbar

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Specify Axes for 3-D Scatter Plot

Open Live Script

Since R2019b

You can display a tiling of plots using the tiledlayout and nexttile functions.

Load the seamount data set to get vectors x, y, and z. Call the tiledlayout function to create a 2-by-1 tiled chart layout. Call the nexttile function to create the axes objects ax1 and ax2. Then create separate scatter plots in the axes by specifying the axes object as the first argument to scatter3.

load seamounttiledlayout(2,1)ax1 = nexttile;ax2 = nexttile;scatter3(ax1,x,y,z,'MarkerFaceColor',[0 .75 .75])scatter3(ax2,x,y,z,'*')

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Set Scatter Series Properties Using Handle

Open Live Script

Use the sphere function to create vectors x, y, and z.

[X,Y,Z] = sphere(16);x = [0.5*X(:); 0.75*X(:); X(:)];y = [0.5*Y(:); 0.75*Y(:); Y(:)];z = [0.5*Z(:); 0.75*Z(:); Z(:)];

Create vectors s and c to specify the size and color for each marker.

S = repmat([70,50,20],numel(X),1);C = repmat([1,2,3],numel(X),1);s = S(:);c = C(:);

Create a 3-D scatter plot and return the scatter series object.

h = scatter3(x,y,z,s,c);

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Use an RGB triplet color value to set the marker face color. Use dot notation to set properties.

h.MarkerFaceColor = [0 0.5 0.5];

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Input Arguments

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Xx-coordinates
scalar | vector | matrix

x-coordinates, specified as a scalar, vector, or matrix. The size and shape of X depends on the shape of your data. This table describes the most common situations.

Type of PlotHow to Specify Coordinates
Single point

Specify X, Y, and Z as scalars. For example:

scatter3(1,2,3)
One set of points

Specify X, Y, and Z as any combination of row or column vectors of the same length. For example:

X = [1 2 3 4];Y = [5; 6; 7; 8];Z = [9 10 11 12];scatter3(X,Y,Z)
Multiple sets of points that are different colors

If all the data sets share coordinates in one or more dimensions, specify the shared coordinates as a vector and the other coordinates as matrices. The length of the vector must match one of the dimensions of the matrices. For example, plot two data sets that share the same x-coordinates.

X = [1 2 3 4];Y = [4 5 6 7; 8 9 10 11];Z = [10 11 12 13; 14 15 16 17];scatter3(X,Y,Z)
If the matrices are square, scatter3 plots a separate set of points for each column in the matrices.

Alternatively, specify X, Y, and Z as matrices of equal size. In this case, scatter3 plots the columns of the matrices. For example, plot four data sets.

X = [1 3 5 6; 2 4 6 8];Y = [10 25 45 61; 20 40 60 70];Z = [12 5 6 8; 9 13 2 7];scatter3(X,Y,Z)

Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64 | categorical | datetime | duration

Yy-coordinates
scalar | vector | matrix

y-coordinates, specified as a scalar, vector, or matrix. The size and shape of y depends on the shape of your data. This table describes the most common situations.

Type of PlotHow to Specify Coordinates
Single point

Specify X, Y, and Z as scalars. For example:

scatter3(1,2,3)
One set of points

Specify X, Y, and Z as any combination of row or column vectors of the same length. For example:

X = [1 2 3 4];Y = [5; 6; 7; 8];Z = [9 10 11 12];scatter3(X,Y,Z)
Multiple sets of points that are different colors

If all the data sets share coordinates in one or more dimensions, specify the shared coordinates as a vector and the other coordinates as matrices. The length of the vector must match one of the dimensions of the matrices. For example, plot two data sets that share the same x-coordinates.

X = [1 2 3 4];Y = [4 5 6 7; 8 9 10 11];Z = [10 11 12 13; 14 15 16 17];scatter3(X,Y,Z)
If the matrices are square, scatter3 plots a separate set of points for each column in the matrices.

Alternatively, specify X, Y, and Z as matrices of equal size. In this case, scatter3 plots the columns of the matrices. For example, plot four data sets.

X = [1 3 5 6; 2 4 6 8];Y = [10 25 45 61; 20 40 60 70];Z = [12 5 6 8; 9 13 2 7];scatter3(X,Y,Z)

Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64 | categorical | datetime | duration

Zz-coordinates
scalar | vector | matrix

z-coordinates, specified as a scalar, vector, or matrix. The size and shape of Z depends on the shape of your data. This table describes the most common situations.

Type of PlotHow to Specify Coordinates
Single point

Specify X, Y, and Z as scalars. For example:

scatter3(1,2,3)
One set of points

Specify X, Y, and Z as any combination of row or column vectors of the same length. For example:

X = [1 2 3 4];Y = [5; 6; 7; 8];Z = [9 10 11 12];scatter3(X,Y,Z)
Multiple sets of points that are different colors

If all the data sets share coordinates in one or more dimensions, specify the shared coordinates as a vector and the other coordinates as matrices. The length of the vector must match one of the dimensions of the matrices. For example, plot two data sets that share the same x-coordinates.

X = [1 2 3 4];Y = [4 5 6 7; 8 9 10 11];Z = [10 11 12 13; 14 15 16 17];scatter3(X,Y,Z)
If the matrices are square, scatter3 plots a separate set of points for each column in the matrices.

Alternatively, specify X, Y, and Z as matrices of equal size. In this case, scatter3 plots the columns of the matrices. For example, plot four data sets.

X = [1 3 5 6; 2 4 6 8];Y = [10 25 45 61; 20 40 60 70];Z = [12 5 6 8; 9 13 2 7];scatter3(X,Y,Z)

Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64 | categorical | datetime | duration

SMarker size
36 (default) | numeric scalar | row or column vector | matrix | []

Marker size, specified as a numeric scalar, vector, matrix, or empty array ([]). The size controls the area of each marker in points squared. An empty array specifies the default size of 36 points. The way you specify the size depends on how you specify X, Y, and Z and how you want the plot to look. This table describes the most common situations.

Marker SizeX, Y, and Z SExample

Same size for all points

Any valid combination of vectors or matrices described for X, Y, and Z

Scalar

Specify X as a vector, Y and Z as matrices, and S as a scalar.

X = [1 2 3 4];Y = [5 6 7 8; 9 10 11 12];Z = [13 14 15 16; 17 18 19 20];scatter3(X,Y,Z,100)

Different size for each point

Vectors of the same length

  • A vector with the same length as X, Y, and Z.

  • A matrix with at least one dimension that matches the lengths of X, Y, and Z. Specifying a matrix is useful for displaying multiple markers with different sizes at each (x,y,z) location.

Specify X, Y, Z, and S as vectors.

X = [1 2 3 4];Y = [4 5 6 7];Z = [8 9 10 11];S = [80 150 700 50];scatter3(X,Y,Z,S)

Specify X, Y, and Z as vectors and S as a matrix.

X = [1 2 3 4];Y = [5 6 7 8];Z = [9 10 11 12];S = [80 30; 150 900; 50 500; 200 350];scatter3(X,Y,Z,S)

Different size for each point

At least one of X, Y, or Z is a matrix for plotting multiple data sets

  • A vector with the same number of elements as there are points in each data set.

  • A matrix that has the same size as the X, Y, or Z matrix.

Specify X as a vector, Y and Z as matrices, and S as a vector.

X = [1 2 3 4];Y = [1 6; 3 8; 2 7; 4 9];Z = [2 8; 3 10; 4 7; 4 12];S = [80 150 200 350];scatter3(X,Y,Z,S)

Specify X as a vector and Y, Z, and S as matrices.

X = [1 2 3 4];Y = [1 6; 3 8; 2 7; 4 9];Z = [10 11; 12 13; 14 15; 16 17];S = [80 30; 150 900; 50 2000; 200 350];scatter3(X,Y,Z,S)

Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64

CMarker color
color name | RGB triplet | matrix of RGB triplets | vector of colormap indices

Marker color, specified as a color name, RGB triplet, matrix of RGB triplets, or a vector of colormap indices.

  • Color name — A color name such as "red", or a short name such as "r".

  • RGB triplet — A three-element row vector whose elements specify the intensities of the red, green, and blue components of the color. The intensities must be in the range [0,1]; for example, [0.4 0.6 0.7]. RGB triplets are useful for creating custom colors.

  • Matrix of RGB triplets — A three-column matrix in which each row is an RGB triplet.

  • Vector of colormap indices — A vector of numeric values that is the same length as the X, Y, and Z vectors.

The way you specify the color depends on your preferred color scheme and whether you are plotting one set of coordinates or multiple sets of coordinates. This table describes the most common situations.

Color SchemeHow to Specify the ColorExample

Use one color for all the points.

Specify a color name or a short name from the table below, or specify one RGB triplet.

Plot one set of points, and specify the color as "red".

X = [1 2 3 4];Y = [2 5 3 6];Z = [10 6 4 7];S = 50;scatter3(X,Y,Z,S,"red")

Plot two sets of points, and specify the color as red using the RGB triplet [1 0 0].

X = [1 2 3 4];Y = [2 5 3 6];Z = [2 5; 1 2; 8 4; 7 9];S = 50;scatter3(X,Y,Z,S,[1 0 0])

Assign different colors to each point using a colormap.

Specify a row or column vector of numbers. The numbers map into the current colormap array. The smallest value maps to the first row in the colormap, and the largest value maps to the last row. The intermediate values map linearly to the intermediate rows.

If your plot has three points, specify a column vector to ensure the values are interpreted as colormap indices.

You can use this method only when X, Y, and Z are vectors, and S is either a vector or a scalar.

Create a vector C that specifies four colormap indices. Plot four points using the colors from the current colormap. Then, change the colormap to winter.

C = [1 2 3 4];X = [1 2 3 4];Y = [1 0 6 2];Z = [2 5 3 7];S = 50;scatter3(X,Y,Z,S,C)colormap(gca,"winter")

Create a custom color for each point.

Specify an m-by-3 matrix of RGB triplets, where m is the number of points in the plot.

You can use this method only when X, Y, and Z are vectors, and S is either a vector or a scalar.

Create a matrix C that specifies RGB triplets for green, red, gray, and purple. Then create a scatter plot of four points using those colors.

C = [0 1 0; 1 0 0; 0.5 0.5 0.5; 0.6 0 1];X = [1 2 3 4];Y = [2 5 3 6];Z = [10 6 4 7];S = 50;scatter3(X,Y,Z,S,C)

Create a different color for each data set.

Specify an n-by-3 matrix of RGB triplets, where n is the number of data sets.

You can use this method only when at least one of X, Y, Z, or S is a matrix.

Create a matrix C that contains two RGB triplets. Then plot two data sets using those colors.

C = [1 0 0; 0.6 0 1];X = [1 2 3 4];Y = [5 6 7 8];Z = [2 5; 1 2; 8 4; 11 9];S = 50;scatter3(X,Y,Z,S,C)

Color Names and RGB Triplets for Common Colors

Color NameShort NameRGB TripletHexadecimal Color CodeAppearance
"red""r"[1 0 0]"#FF0000"

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"green""g"[0 1 0]"#00FF00"

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"blue""b"[0 0 1]"#0000FF"

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"cyan" "c"[0 1 1]"#00FFFF"

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"magenta""m"[1 0 1]"#FF00FF"

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"yellow""y"[1 1 0]"#FFFF00"

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"black""k"[0 0 0]"#000000"

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"white""w"[1 1 1]"#FFFFFF"

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Here are the RGB triplets and hexadecimal color codes for the default colors MATLAB® uses in many types of plots.

RGB TripletHexadecimal Color CodeAppearance
[0 0.4470 0.7410]"#0072BD"

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[0.8500 0.3250 0.0980]"#D95319"

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[0.9290 0.6940 0.1250]"#EDB120"

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[0.4940 0.1840 0.5560]"#7E2F8E"

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[0.4660 0.6740 0.1880]"#77AC30"

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[0.3010 0.7450 0.9330]"#4DBEEE"

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[0.6350 0.0780 0.1840]"#A2142F"

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markertypeMarker
'o' (default) | '+' | '*' | '.' | 'x' | ...

Marker, specified as one of the markers in this table.

MarkerDescriptionResulting Marker
"o"Circle

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"+"Plus sign

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"*"Asterisk

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"."Point

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"x"Cross

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"_"Horizontal line

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"|"Vertical line

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"square"Square

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"diamond"Diamond

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"^"Upward-pointing triangle

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"v"Downward-pointing triangle

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">"Right-pointing triangle

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"<"Left-pointing triangle

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"pentagram"Pentagram

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"hexagram"Hexagram

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"none"No markersNot applicable

'filled'Option to fill interior of markers
'filled'

Option to fill the interior of the markers, specified as 'filled'. Use this option with markers that have a face, for example, 'o' or 'square'. Markers that do not have a face and contain only edges do not draw ('+', '*', '.', and 'x').

The 'filled' option sets the MarkerFaceColor property of the Scatter object to 'flat' and the MarkerEdgeColor property to 'none', so the marker faces draw, but the edges do not.

tblSource table
table | timetable

Source table containing the data to plot, specified as a table or a timetable.

xvarTable variables containing x-coordinates
one or more table variable indices

Table variables containing the x-coordinates, specified as one or more table variable indices.

Specifying Table Indices

Use any of the following indexing schemes to specify the desired variable or variables.

Indexing SchemeExamples

Variable names:

  • A string, character vector, or cell array.

  • A pattern object.

  • "A" or 'A' — A variable named A

  • ["A","B"] or {'A','B'} — Two variables named A and B

  • "Var"+digitsPattern(1) — Variables named "Var" followed by a single digit

Variable index:

  • An index number that refers to the location of a variable in the table.

  • A vector of numbers.

  • A logical vector. Typically, this vector is the same length as the number of variables, but you can omit trailing 0 or false values.

  • 3 — The third variable from the table

  • [2 3] — The second and third variables from the table

  • [false false true] — The third variable

Variable type:

  • A vartype subscript that selects variables of a specified type.

  • vartype("categorical") — All the variables containing categorical values

Plotting Your Data

The table variables you specify can contain numeric, categorical, datetime, or duration values.

To plot one data set, specify one variable for xvar, one variable for yvar, and one variable for zvar. For example, read Patients.xls into the table tbl. Plot the Height, Weight, and Diastolic variables.

tbl = readtable("Patients.xls");scatter3(tbl,"Height","Weight","Diastolic")

To plot multiple data sets together, specify multiple variables for at least one of xvar, yvar, or zvar. If you specify multiple variables for more than one argument, the number of variables must be the same for each of those arguments.

For example, plot the Weight variable on the x-axis, the Systolic and Diastolic variables on the y-axis, and the Age variable on the z-axis.

scatter3(tbl,"Weight",["Systolic","Diastolic"],"Age")

You can also use different indexing schemes for xvar, yvar, and zvar. For example, specify xvar as a variable name, yvar as an index number, and zvar as a logical vector.

scatter3(tbl,"Height",6,[false false true])

yvarTable variables containing y-coordinates
one or more table variable indices

Table variables containing the y-coordinates, specified as one or more table variable indices.

Specifying Table Indices

Use any of the following indexing schemes to specify the desired variable or variables.

Indexing SchemeExamples

Variable names:

  • A string, character vector, or cell array.

  • A pattern object.

  • "A" or 'A' — A variable named A

  • ["A","B"] or {'A','B'} — Two variables named A and B

  • "Var"+digitsPattern(1) — Variables named "Var" followed by a single digit

Variable index:

  • An index number that refers to the location of a variable in the table.

  • A vector of numbers.

  • A logical vector. Typically, this vector is the same length as the number of variables, but you can omit trailing 0 or false values.

  • 3 — The third variable from the table

  • [2 3] — The second and third variables from the table

  • [false false true] — The third variable

Variable type:

  • A vartype subscript that selects variables of a specified type.

  • vartype("categorical") — All the variables containing categorical values

Plotting Your Data

The table variables you specify can contain numeric, categorical, datetime, or duration values.

To plot one data set, specify one variable for xvar, one variable for yvar, and one variable for zvar. For example, read Patients.xls into the table tbl. Plot the Height, Weight, and Diastolic variables.

tbl = readtable("Patients.xls");scatter3(tbl,"Height","Weight","Diastolic")

To plot multiple data sets together, specify multiple variables for at least one of xvar, yvar, or zvar. If you specify multiple variables for more than one argument, the number of variables must be the same for each of those arguments.

For example, plot the Weight variable on the x-axis, the Systolic and Diastolic variables on the y-axis, and the Age variable on the z-axis.

scatter3(tbl,"Weight",["Systolic","Diastolic"],"Age")

You can also use different indexing schemes for xvar, yvar, and zvar. For example, specify xvar as a variable name, yvar as an index number, and zvar as a logical vector.

scatter3(tbl,"Height",6,[false false true])

zvarTable variables containing z-coordinates
one or more table variable indices

Table variables containing the z-coordinates, specified as one or more table variable indices.

Specifying Table Indices

Use any of the following indexing schemes to specify the desired variable or variables.

Indexing SchemeExamples

Variable names:

  • A string, character vector, or cell array.

  • A pattern object.

  • "A" or 'A' — A variable named A

  • ["A","B"] or {'A','B'} — Two variables named A and B

  • "Var"+digitsPattern(1) — Variables named "Var" followed by a single digit

Variable index:

  • An index number that refers to the location of a variable in the table.

  • A vector of numbers.

  • A logical vector. Typically, this vector is the same length as the number of variables, but you can omit trailing 0 or false values.

  • 3 — The third variable from the table

  • [2 3] — The second and third variables from the table

  • [false false true] — The third variable

Variable type:

  • A vartype subscript that selects variables of a specified type.

  • vartype("categorical") — All the variables containing categorical values

Plotting Your Data

The table variables you specify can contain numeric, categorical, datetime, or duration values.

To plot one data set, specify one variable for xvar, one variable for yvar, and one variable for zvar. For example, read Patients.xls into the table tbl. Plot the Height, Weight, and Diastolic variables.

tbl = readtable("Patients.xls");scatter3(tbl,"Height","Weight","Diastolic")

To plot multiple data sets together, specify multiple variables for at least one of xvar, yvar, or zvar. If you specify multiple variables for more than one argument, the number of variables must be the same for each of those arguments.

For example, plot the Weight variable on the x-axis, the Systolic and Diastolic variables on the y-axis, and the Age variable on the z-axis.

scatter3(tbl,"Weight",["Systolic","Diastolic"],"Age")

You can also use different indexing schemes for xvar, yvar, and zvar. For example, specify xvar as a variable name, yvar as an index number, and zvar as a logical vector.

scatter3(tbl,"Height",6,[false false true])

axAxes object
axes object

Axes object. If you do not specify an axes, then scatter3 plotsinto the current axes.

Name-Value Arguments

Specify optional pairs of arguments as Name1=Value1,...,NameN=ValueN, where Name is the argument name and Value is the corresponding value. Name-value arguments must appear after other arguments, but the order of the pairs does not matter.

Before R2021a, use commas to separate each name and value, and enclose Name in quotes.

Example: 'MarkerFaceColor','red' sets themarker face color to red.

The properties listed here are only a subset. For a completelist, see Scatter Properties.

ColorVariableTable variable containing color data
table variable index

Table variable containing the color data, specified as a variable index into the source table.

Specifying the Table Index

Use any of the following indexing schemes to specify the desired variable.

Indexing SchemeExamples

Variable name:

  • A string scalar or character vector.

  • A pattern object. The pattern object must refer to only one variable.

  • "A" or 'A' — A variable named A

  • "Var"+digitsPattern(1) — The variable with the name "Var" followed by a single digit

Variable index:

  • An index number that refers to the location of a variable in the table.

  • A logical vector. Typically, this vector is the same length as the number of variables, but you can omit trailing 0 or false values.

  • 3 — The third variable from the table

  • [false false true] — The third variable

Variable type:

  • A vartype subscript that selects a table variable of a specified type. The subscript must refer to only one variable.

  • vartype("double") — The variable containing double values

Specifying Color Data

Specifying the ColorVariable property controls the colors of the markers. The data in the variable controls the marker fill color when the MarkerFaceColor property is set to "flat". The data can also control the marker outline color, when the MarkerEdgeColor is set to "flat".

The table variable you specify can contain values of any numeric type. The values can be in either of the following forms:

  • A column of numbers that linearly map into the current colormap.

  • A three-column array of RGB triplets. RGB triplets are three-element vectors whose values specify the intensities of the red, green, and blue components of specific colors. The intensities must be in the range [0,1]. For example, [0.5 0.7 1] specifies a shade of light blue.

When you set the ColorVariable property, MATLAB updates the CData property.

Output Arguments

collapse all

hScatter object
Scatter object

Scatter object. This is a unique identifier,which you can use to query and modify the properties of the Scatter objectafter it is created.

Extended Capabilities

Version History

Introduced before R2006a

expand all

The scatter3 function now accepts combinations of vectors and matrices for the coordinates. As a result, you can visualize multiple data sets at once rather than using the hold function between plotting commands.

Create plots by passing a table to the scatter3 function followed by the variables you want to plot. When you specify your data as a table, the axis labels and the legend (if present) are automatically labeled using the table variable names.

See Also

Functions

  • scatter | plot3 | bubblechart3 | swarmchart3

Properties

  • Scatter Properties

Topics

  • Plot Dates and Times
  • Plot Categorical Data
  • Plots That Support Tables

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3-D scatter plot - MATLAB scatter3
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FAQs

How to plot 3D graph in MATLAB code? ›

To plot a 3D surface from a data file in MATLAB, you will need to have the data file open in MATLAB. Once you have the data file available, you can use the plot3 command to plot the data. The plot3 command will create a 3D plot of the data. You can also use the surf command to create a 3D surface plot.

What is the X Y Z scatter plot? ›

An XYZ class scatter plot is a scatter plot with symbols that mark the intersection of X, Y, and Z column data based on a required fourth value (Class column). Class scatter plots group data into discrete classes (bins). The data points are displayed using the symbol assigned to the class.

How do you plot XYZ coordinates? ›

In the same way that we plot points in two-dimensional coordinate space by moving out along the x-axis to our x value, and then moving parallel to the y-axis until we find our point, in three-dimensional space we'll move along the x-axis, then parallel to the y-axis, then parallel to the z-axis until we arrive at our ...

Which command is used to plot a 3D surface in MATLAB? ›

surf( X , Y , Z ) creates a three-dimensional surface plot, which is a three-dimensional surface that has solid edge colors and solid face colors. The function plots the values in matrix Z as heights above a grid in the x-y plane defined by X and Y .

How to plot a 3D graph in MATLAB using Excel data? ›

The following example will illustrates how to do that:
  1. % Read the data points as a matrix.
  2. T = readmatrix('3DPlot.xlsx');
  3. % Create a meshgrid for plotting.
  4. [xq,yq] = meshgrid(0:.2:11.5, 0:.2:7.6);
  5. % Interpolate the points using griddata function.
  6. vq = griddata(t(:, 1), t(:, 2), t(:, 3),xq,yq);
  7. % Plot the surface.
Nov 23, 2022

What is a plot 3 dimensional function? ›

Plot3D is also known as a surface plot or surface graph. Plot3D evaluates f at values of x and y in the domain being plotted over and connects the points {x,y,f[x,y]} to form a surface showing how f varies with x and y. It visualizes the surface .

What is a 3 axis scatter plot? ›

Unlike a classic XY scatter chart, a 3D scatter plot displays data points on three axes (x, y, and z) in order to show the relationship between three variables. Therefore, it is often called an XYZ plot.

How to draw a scatter plot? ›

To construct a scatter diagram:
  1. Identify the independent and dependent variables.
  2. Assign the independent variable to the horizontal or x -axis. Assign the dependent variable to the vertical or y -axis.
  3. Plot the points on an (x,y) -grid.
  4. Label the axes, including both the variable names and units.
  5. Include a chart title.

What is the formula for a scatter plot? ›

The equation that best represents the line of best fit for the scatter plot is a straight line, usually represented by the equation y = mx + b. m being the slope and b being the y intercept.

What is the purpose of a 3D scatter plot? ›

3D scatter plots are used to plot data points on three axes in the attempt to show the relationship between three variables. Each row in the data table is represented by a marker whose position depends on its values in the columns set on the X, Y, and Z axes.

What is the size of the marker in a 3D scatter plot? ›

The default type of the marker is a circle, the default color is "blue" and the default marker size is 36. This means the circle surrounding the marker has an area of 36 points squared. Using scatter3d(x,y,z,s,c) different sizes and colors for each marker can be specified.

How do you rotate a 3D scatter plot? ›

Direct link to this answer
  1. Draw a 3d line plot of the corresponding scatter plot.
  2. Rotate that 3d line plot using the rotate function.
  3. get the data from the line plot and draw the corresponding 3dScatterplot .
Jan 15, 2021

What is XYZ in 3-D? ›

A three-dimensional structure. The x-axis and y-axis represent the first two dimensions; the z-axis, the third dimension. In a graphic image, the x and y denote width and height; the z denotes depth.

How to create 3-D geometry in MATLAB? ›

Use multicuboid , multicylinder , or multisphere to create a 3-D geometry. Then assign the resulting geometry to the Geometry property of the model. For example, create a PDE model and add the following geometry formed by three spheres to the model. model = createpde; gm = multisphere([1,2,3]); model.

How to plot xy graph in MATLAB? ›

To add an XY plot to your layout, click Visualizations and layouts . Then, from Visualizations, click or click and drag the XY icon onto the subplot. To plot signals on the XY plot, select signals in the table. Then, assign signal pairs to the x-Axis and y-Axis of a row in the XY Data dialog box.

How to plot 3-D sine wave in MATLAB? ›

Direct link to this answer
  1. t = 0:0.01:5*pi;
  2. y = sin(t);
  3. z = 0:pi/12:2*pi;
  4. clf()
  5. axes()
  6. hold on.
  7. for i = 1:numel(z)
  8. plot3(t,z(i)*ones(size(t)),y);
Nov 21, 2019

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