triplot
2-D triangular plot
Description
triplot(
plots the triangles defined by a
2-D TO
)triangulation
or delaunayTriangulation
object.
triplot(___,
specifies
one or more properties of the plot using name-value pairs. For example,
Name,Value
)'LineWidth',2
sets the edge width to 2 points.
h = triplot(___)
returns a chart
line handle used to create the plot. Use h
to query and modify properties
of the plot. For more information, see Line Properties.
Examples
Create and plot a Delaunay triangulation from a set of 2-D points.
rng default;
P = rand(10,2);
T = delaunayTriangulation(P);
triplot(T)
Input Arguments
Triangle connectivity, specified as a 3-column matrix where each row contains the point vertices defining a triangle.
x-coordinates, specified as a column vector.
y-coordinates, specified as a column vector.
Line style, marker, and color, specified as a string scalar or character vector containing symbols. The symbols can appear in any order. You do not need to specify all three characteristics (line style, marker, and color). For example, if you omit the line style and specify the marker, then the plot shows only the marker and no line.
Example: "--or"
is a red dashed line with circle markers.
Line Style | Description | Resulting Line |
---|---|---|
"-" | Solid line |
|
"--" | Dashed line |
|
":" | Dotted line |
|
"-." | Dash-dotted line |
|
Marker | Description | Resulting Marker |
---|---|---|
"o" | Circle |
|
"+" | Plus sign |
|
"*" | Asterisk |
|
"." | Point |
|
"x" | Cross |
|
"_" | Horizontal line |
|
"|" | Vertical line |
|
"square" | Square |
|
"diamond" | Diamond |
|
"^" | Upward-pointing triangle |
|
"v" | Downward-pointing triangle |
|
">" | Right-pointing triangle |
|
"<" | Left-pointing triangle |
|
"pentagram" | Pentagram |
|
"hexagram" | Hexagram |
|
Color Name | Short Name | RGB Triplet | Appearance |
---|---|---|---|
"red" | "r" | [1 0 0] |
|
"green" | "g" | [0 1 0] |
|
"blue" | "b" | [0 0 1] |
|
"cyan"
| "c" | [0 1 1] |
|
"magenta" | "m" | [1 0 1] |
|
"yellow" | "y" | [1 1 0] |
|
"black" | "k" | [0 0 0] |
|
"white" | "w" | [1 1 1] |
|
Triangulation object, specified as a 2-D triangulation
or
delaunayTriangulation
object.
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: triplot(TO,'LineStyle','--')
The properties listed here are only a subset. For a complete list, see Line Properties.
Line color, specified as an RGB triplet, a hexadecimal color code, a color name, or a
short name. The default 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 from0
toF
. 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 |
---|---|
Before R2025a: Most plots use these colors by 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"
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 |
Line width, specified as a positive value in points, where 1 point = 1/72 of an inch. If the line has markers, then the line width also affects the marker edges.
The line width cannot be thinner than the width of a pixel. If you set the line width to a value that is less than the width of a pixel on your system, the line displays as one pixel wide.
Version History
Introduced before R2006a
See Also
delaunayTriangulation
| triangulation
| delaunay
| trimesh
| trisurf
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