rectangle

Create rectangle with sharp or curved corners

Syntax

rectangle('Position',pos)

rectangle('Position',pos,'Curvature',cur)

rectangle(___,Name,Value)

rectangle(ax,___)

r = rectangle(___)

Description

rectangle('Position',pos) creates a rectangle in 2-D coordinates. Specify pos as a four-element vector of the form [x y w h] in data units. The x and y elements determine the location and the w and h elements determine the size. The function plots into the current axes without clearing existing content from the axes.

rectangle('Position',pos,'Curvature',cur) adds curvature to the sides of the rectangle. For different curvatures along the horizontal and vertical sides, specify cur as a two-element vector of the form [horizontal vertical]. For the same length of curvature along all sides, specify cur as a scalar value. Specify values between 0 (no curvature) and 1 (maximum curvature). Use [1 1] to create an ellipse or circle.

rectangle(___,Name,Value) specifies rectangle properties using one or more name-value pair arguments. For example, 'FaceColor','red' specifies a red fill color. You can specify rectangle properties with any of the input argument combinations in the previous syntaxes.

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

r = rectangle(___) returns the rectangle object. Use r to modify properties of the rectangle after it is created. For a list of properties, see Rectangle Properties. You can return an output argument with any of the previous syntaxes.

Examples

Draw Rectangle

Draw a rectangle that has a lower left corner at the point (1,2). Make the width of the rectangle 5 units and the height 6 units. Then, change the axis limits.

rectangle('Position',[1 2 5 6])
axis([0 10 0 10])

Draw Rectangle with Curved Edges

Draw a rectangle that has a lower left corner at (0,0) and an upper right corner at (2,4). Create the rectangle with curved corners by specifying the curvature as the scalar value 0.2. For data units of equal length along both the x-axis and y-axis, use axis equal.

figure
rectangle('Position',[0 0 2 4],'Curvature',0.2)
axis equal

Add a second rectangle that has the shortest side completely curved by specifying the curvature as the scalar value 1.

rectangle('Position',[3 0 2 4],'Curvature',1)

Add a third rectangle and use different curvatures along the horizontal and vertical sides. Use a horizontal curvature of 0.5 to make 50 percent of each horizontal side curved. Use a vertical curvature of 1 to make both vertical sides completely curved.

rectangle('Position',[6 0 2 4],'Curvature',[0.5,1])

Draw Circle

Draw a circle by setting the Curvature property to [1 1]. Draw the circle so that it fills the rectangular area between the points (2,4) and (4,6). The Position property defines the smallest rectangle that contains the circle.

pos = [2 4 2 2]; 
rectangle('Position',pos,'Curvature',[1 1])
axis equal

Draw a red rectangle using the same position values to show how the circle fills the rectangular area.

rectangle('Position',pos,'EdgeColor','r')

Specify Rectangle Outline and Fill Color

Draw a rectangle and specify the fill color, outline color, and outline width.

rectangle('Position',[1,2,5,10],'FaceColor',[0 .5 .5],'EdgeColor','b',...
    'LineWidth',3)

Modify Rectangle After Creation

Add a rectangle to the current axes and return the rectangle object, r.

r = rectangle('Position',[0 0 1 1]')

r = 
  Rectangle with properties:

    FaceColor: 'none'
    EdgeColor: [0.1294 0.1294 0.1294]
    LineWidth: 0.5000
    LineStyle: '-'
    Curvature: [0 0]
     Position: [0 0 1 1]

  Show all properties

Modify the rectangle after creation using r. Change the fill color, outline color, and outline width.

r.FaceColor = [0 .5 .5];
r.EdgeColor = 'b';
r.LineWidth = 3;

Input Arguments

pos — Size and location of rectangle

four-element vector of the form [x y w h]

Size and location of the rectangle, specified as a four-element vector of the form [x y w h]. The x and y elements define the coordinate for the lower left corner of the rectangle. The w and h elements define the dimensions of the rectangle.

All values are in data units.

Example: rectangle('Position',[0.5 0.5 0.3 0.4])

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

cur — Amount of horizontal and vertical curvature

[0 0] (default) | two-element vector | scalar

Amount of horizontal and vertical curvature, specified as a two-element vector or a scalar value. Use this property to vary the shape of the rectangle from rectangular to ellipsoidal.

The horizontal curvature is the fraction of the width that is curved along the top and bottom edges. The vertical curvature is the fraction of the height that is curved along the left and right edges.

• To use different horizontal and vertical curvatures, specify a two-element vector of the form [horizontal vertical]. The horizontal element determines the horizontal curvature and the vertical element determines the vertical curvature. Specify the values between 0 (no curvature) and 1 (maximum curvature). For example, a value of [0 0] creates a rectangle with square edges and value of [1 1] creates an ellipse.

• To use the same curvature for the horizontal and vertical edges, specify a scalar value between 0 and 1, inclusive. The shorter dimension determines the length of the curvature.

Example: [0.5 0.6]

Example: 0.75

Data Types: double

ax — Axes object

axes object

Axes object. If you do not specify an axes object, then rectangle uses 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: rectangle('Position',[0 0 1 1],'EdgeColor','k','FaceColor',[0 .5 .5])

FaceColor — Fill color

"none" (default) | RGB triplet | hexadecimal color code | "r" | "g" | "b" | ...

Fill color, specified as an RGB triplet, a hexadecimal color code, a color name, or a short name.

For a custom color, specify an RGB triplet or a hexadecimal color code.

• An RGB triplet is 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].

• A hexadecimal color code is a string scalar or character vector that starts with a hash symbol (#) followed by three or six hexadecimal digits, which can range from 0 to F. The values are not case sensitive. Therefore, the color codes "#FF8800", "#ff8800", "#F80", and "#f80" are equivalent.

Alternatively, you can specify some common colors by name. This table lists the named color options, the equivalent RGB triplets, and the hexadecimal color codes.

Color Name	Short Name	RGB Triplet	Hexadecimal Color Code	Appearance
"red"	"r"	[1 0 0]	"#FF0000"
"green"	"g"	[0 1 0]	"#00FF00"
"blue"	"b"	[0 0 1]	"#0000FF"
"cyan"	"c"	[0 1 1]	"#00FFFF"
"magenta"	"m"	[1 0 1]	"#FF00FF"
"yellow"	"y"	[1 1 0]	"#FFFF00"
"black"	"k"	[0 0 0]	"#000000"
"white"	"w"	[1 1 1]	"#FFFFFF"
"none"	Not applicable	Not applicable	Not applicable	No color

This table lists the default color palettes for plots in the light and dark themes.

Palette	Palette Colors
"gem" — Light theme default Before R2025a: Most plots use these colors by default.
"glow" — Dark theme default

You can get the RGB triplets and hexadecimal color codes for these palettes using the orderedcolors and rgb2hex functions. For example, get the RGB triplets for the "gem" palette and convert them to hexadecimal color codes.

RGB = orderedcolors("gem");
H = rgb2hex(RGB);

Before R2023b: Get the RGB triplets using RGB = get(groot,"FactoryAxesColorOrder").

Before R2024a: Get the hexadecimal color codes using H = compose("#%02X%02X%02X",round(RGB*255)).

Example: "blue"

Example: [0 0 1]

Example: "#0000FF"

EdgeColor — Outline color

RGB triplet | hexadecimal color code | 'r' | 'g' | 'b' | ...

Outline color, specified as an RGB triplet, a hexadecimal color code, a color name, or a short name. The default RGB triplet value of [0 0 0] corresponds to black.

For a custom color, specify an RGB triplet or a hexadecimal color code.

• An RGB triplet is 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].

• A hexadecimal color code is a string scalar or character vector that starts with a hash symbol (#) followed by three or six hexadecimal digits, which can range from 0 to F. The values are not case sensitive. Therefore, the color codes "#FF8800", "#ff8800", "#F80", and "#f80" are equivalent.

Alternatively, you can specify some common colors by name. This table lists the named color options, the equivalent RGB triplets, and the hexadecimal color codes.

Color Name	Short Name	RGB Triplet	Hexadecimal Color Code	Appearance
"red"	"r"	[1 0 0]	"#FF0000"
"green"	"g"	[0 1 0]	"#00FF00"
"blue"	"b"	[0 0 1]	"#0000FF"
"cyan"	"c"	[0 1 1]	"#00FFFF"
"magenta"	"m"	[1 0 1]	"#FF00FF"
"yellow"	"y"	[1 1 0]	"#FFFF00"
"black"	"k"	[0 0 0]	"#000000"
"white"	"w"	[1 1 1]	"#FFFFFF"
"none"	Not applicable	Not applicable	Not applicable	No color

This table lists the default color palettes for plots in the light and dark themes.

Palette	Palette Colors
"gem" — Light theme default Before R2025a: Most plots use these colors by default.
"glow" — Dark theme default

You can get the RGB triplets and hexadecimal color codes for these palettes using the orderedcolors and rgb2hex functions. For example, get the RGB triplets for the "gem" palette and convert them to hexadecimal color codes.

RGB = orderedcolors("gem");
H = rgb2hex(RGB);

Before R2023b: Get the RGB triplets using RGB = get(groot,"FactoryAxesColorOrder").

Before R2024a: Get the hexadecimal color codes using H = compose("#%02X%02X%02X",round(RGB*255)).

Example: 'blue'

Example: [0 0 1]

Example: '#0000FF'

LineWidth — Line width

0.5 (default) | positive value

Line width, specified as a positive value in point units.

Example: 0.75

LineStyle — Line style

"-" (default) | "--" | ":" | "-." | "none"

Line style, specified as one of the options listed in this table.

Line Style	Description	Resulting Line
"-"	Solid line
"--"	Dashed line
":"	Dotted line
"-."	Dash-dotted line
"none"	No line	No line

Version History

Introduced before R2006a