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# scatter3

3-D scatter plot

## Description

example

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

example

scatter3(X,Y,Z,S) draws each circle with the size specified by S. To plot each circle with equal size, specify S as a scalar. To plot each circle with a specific size, specify S as a vector.

example

scatter3(X,Y,Z,S,C) draws each circle with the color specified by C.

• If C is a color string or an RGB row vector, then all circles are plotted with the specified color.

• If C is a three column matrix with the number of rows in C equal to the length of X, Y, and Z, then each row of C specifies an RGB color value for the corresponding circle.

• If C is a vector with length equal to the length of X, Y, and Z, then the values in C are linearly mapped to the colors in the current colormap.

example

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

example

scatter3(___,markertype) specifies the marker type.

example

scatter3(___,Name,Value) specifies scattergroup property settings using one or more Name,Value pair arguments.

example

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

example

h = scatter3(___) returns the scattergroup object handle, h.

## Examples

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### Create 3-D Scatter Plot

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)
```

### Vary Marker Size

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.

```figure
scatter3(x,y,z,s)
view(40,35)
```

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

### Vary Marker Color

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.

```S = repmat([50,25,10],numel(X),1);
C = repmat([1,2,3],numel(X),1);
s = S(:);
c = C(:);
```

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

```figure
scatter3(x,y,z,s,c)
view(40,35)
```

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

### Fill in Markers

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(0,'twister');
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.

```figure
scatter3(x,y,z,'fill')
view(-30,10)
```

### Set Marker Type

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(0,'twister');
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 set the marker type. Use view to change the angle of the axes in the figure.

```figure
scatter3(x,y,z,'*')
view(-30,10)
```

### Set Marker Properties

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(0,'twister');
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 set the marker edge color and the marker face color. Use view to change the angle of the axes in the figure.

```figure
scatter3(x,y,z,...
'MarkerEdgeColor','k',...
'MarkerFaceColor',[0 .75 .75])
view(-30,10)
```

### Specify Axes for 3-D Scatter Plot

Load the seamount data set to get vectors x, y, and z.

```load seamount
```

Create a figure with two subplots and return the handles to the two axes in array hs. In each subplot, create a 3-D scatter plot. Specify the marker properties for each scatter plot.

```figure
hs(1) = subplot(2,1,1);
hs(2) = subplot(2,1,2);
scatter3(hs(1),x,y,z,'MarkerFaceColor',[0 .75 .75])
scatter3(hs(2),x,y,z,'*')
```

### Set Marker Properties Using the Handle

`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 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 scattergroup handle, h.

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

Use the handle to set the marker face color for the scatter plot.

```set(h,'MarkerFaceColor',[0 .5 .5])
```

## Input Arguments

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### X — Value of data to display on x-axisvector

Value of data to display on the x-axis, specified as a vector. X, Y, and Z must be vectors of equal length.

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

### Y — Value of data to display on y-axis (default) | vector

Value of data to display on the y-axis, specified as a vector. X, Y, and Z must be vectors of equal length.

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

### Z — Value of data to display on z-axis (default) | vector

Value of data to display on the z-axis, specified as a vector. X, Y, and Z must be vectors of equal length.

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

### S — Marker area36 (default) | scalar | vector | []

Marker area, specified as a scalar, a vector, or []. The values in S must be positive. The units for area are points squared.

• If S is a scalar, then scatter3 plots all markers with the specified area.

• If S is a row or column vector, then each entry in S specifies the area for the corresponding marker. The length of S must equal the length of X, Y and Z. Corresponding entries in X, Y, Z and S determine the location and area of each marker.

• If S is empty, then the default size of 36 points squared is used.

Example: 50

Example: [36,25,25,17,46]

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

### C — Marker color[0 0 1] (blue) (default) | color string | RGB row vector | three-column matrix of RGB values | vector

Marker color, specified as a color string, an RGB row vector, a three-column matrix of RGB values, or a vector. For an RGB row vector, use 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]. If you have three points in the scatter plot and want the colors to be indices into the colormap, specify C as a three-element column vector.

This table lists the predefined colors and their RGB equivalents.

RGB Vector

Short Name

Long Name

[1 1 0]

'y'

'yellow'

[1 0 1]

'm'

'magenta'

[0 1 1]

'c'

'cyan'

[1 0 0]

'r'

'red'

[0 1 0]

'g'

'green'

[0 0 1]

'b'

'blue'

[1 1 1]

'w'

'white'

[0 0 0]

'k'

'black'

Example: 'y'

Example: [1,2,3,4]

Example: reshape([0,1,0,0,0,1,0.5,1,0.2],3,3)

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

### markertype — Marker type'o' (default) | string

Marker type, specified as a string. The table below lists the supported marker types.

Specifier

Marker Type

'o'

Circle

'+'

Plus sign

'*'

Asterisk

'.'

Point

'x'

Cross

'square' or 's'

Square

'diamond' or 'd'

Diamond

'^'

Upward-pointing triangle

'v'

Downward-pointing triangle

'>'

Right-pointing triangle

'<'

Left-pointing triangle

'pentagram' or 'p'

Five-pointed star (pentagram)

'hexagram' or 'h'

Six-pointed star (hexagram)

'none'

No marker

### axes_handle — Axes handlehandle

Axes handle, which is the reference to an axes object. Use the gca function to get the handle to the current axes, for example, axes_handle = gca;.

### Name-Value Pair Arguments

Specify optional comma-separated pairs of Name,Value arguments. Name is the argument name and Value is the corresponding value. Name must appear inside single quotes (' '). You can specify several name and value pair arguments in any order as Name1,Value1,...,NameN,ValueN.

Example: 'MarkerFaceColor','red' sets the marker face color to red.

### 'LineWidth' — Line width0.5 (default) | scalar

Line width, specified as the comma-separated pair consisting of 'LineWidth' and a scalar. The scalar sets the width size in points of the marker edge.

Example: 'LineWidth',0.75

### 'MarkerEdgeColor' — Marker edge color'flat' (default) | 'none' | 'auto' | three-element RGB vector | string

Marker edge color, specified as the comma-separated pair consisting of 'MarkerEdgeColor' and a color value. The color value can be one of the supported strings or an RGB vector, listed in the following tables.

Specifier

Result

'flat'Sets the color using the CData property.

'auto'

Sets the color to the axes Color property. If the axes Color property is none, then sets the color to the figure Color property.

'none'

Specifies no color, which makes nonfilled markers invisible.

For an RGB vector, use 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]. This table lists the predefined string colors and their RGB equivalents.

RGB Vector

Short Name

Long Name

[1 1 0]

'y'

'yellow'

[1 0 1]

'm'

'magenta'

[0 1 1]

'c'

'cyan'

[1 0 0]

'r'

'red'

[0 1 0]

'g'

'green'

[0 0 1]

'b'

'blue'

[1 1 1]

'w'

'white'

[0 0 0]

'k'

'black'

Example: 'MarkerEdgeColor',[1 .8 .1]

### 'MarkerFaceColor' — Marker face color'none' (default) | 'auto' | 'flat' | three-element RGB vector | string

Marker face color, specified as the comma-separated pair consisting of 'MarkerFaceColor' and a color value. MarkerFaceColor sets the fill color for markers that are closed shapes (circle, square, diamond, pentagram, hexagram, and the four triangles). The color value can be one of the supported strings or an RGB vector, listed in the following tables.

Specifier

Result

'flat'Sets the fill color using the CData property.

'auto'

Sets the fill color to the axes Color property. If the axes Color property is none, then sets the fill color to the figure Color property.

'none'

Makes the interior of the marker transparent, allowing the background to show through.

For an RGB vector, use 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]. This table lists the predefined string colors and their RGB equivalents.

RGB Vector

Short Name

Long Name

[1 1 0]

'y'

'yellow'

[1 0 1]

'm'

'magenta'

[0 1 1]

'c'

'cyan'

[1 0 0]

'r'

'red'

[0 1 0]

'g'

'green'

[0 0 1]

'b'

'blue'

[1 1 1]

'w'

'white'

[0 0 0]

'k'

'black'

Example: 'MarkerFaceColor',[0 .8 1]

## Output Arguments

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### h — Scattergroup object handlescalar

Scattergroup object handle, returned as a scalar. This is a unique identifier, which you can use to query and modify the properties of the scattergroup.