pdepoly

Draw polygon in PDE Modeler app

Syntax

pdepoly(X,Y)

pdepoly(X,Y,label)

Description

pdepoly(X,Y) draws a polygon with the corner coordinates (vertices) defined by X and Y. The pdepoly command opens the PDE Modeler app with the specified polygon drawn in it. If the app is already open, pdepoly adds the specified polygon to the app window without deleting any existing shapes.

pdepoly updates the state of the geometry description matrix inside the PDE Modeler app to include the polygon. You can export the geometry description matrix from the PDE Modeler app to the MATLAB^® Workspace by selecting DrawExport Geometry Description, Set Formula, Labels.... For details on the format of the geometry description matrix, see decsg.

example

pdepoly(X,Y,label) assigns a name to the polygon. Otherwise, pdepoly uses a default name, such as P1, P2, and so on.

example

Examples

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Draw Polygon in PDE Modeler App

Open Live Script

Open the PDE Modeler app window containing a polygon representing the L-shaped membrane geometry.

pdepoly([-1 0 0 1 1 -1],[0 0 1 1 -1 -1])

Call the pdepoly command again to draw the diamond-shaped region with corners in (0.5,0), (1,-0.5), (0.5,-1), and (0,-0.5). The pdepoly command adds the second polygon to the app window without deleting the first.

pdepoly([0.5 1 0.5 0],[0 -0.5 -1 -0.5])

Figure PDE Modeler - [Untitled] contains objects of type uimenu, uigridlayout.

Assign Name to Polygon in PDE Modeler App

Open Live Script

Open the PDE Modeler app window with a polygon representing the L-shaped membrane geometry. Assign the name L-shaped-membrane to this polygon.

pdepoly([-1 0 0 1 1 -1],[0 0 1 1 -1 -1],"L-shaped-membrane")

Figure PDE Modeler - [Untitled] contains objects of type uimenu, uigridlayout.

Input Arguments

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`X` — x-coordinates of vertices
vector of real numbers

x-coordinates of vertices defining the polygon, specified as a vector of real numbers.

Example: pdepoly([-1 0 0 1 1 -1],[0 0 1 1 -1 -1])

Data Types: double

`Y` — y-coordinates of vertices
vector of real numbers

y-coordinates of vertices defining the polygon, specified as a vector of real numbers.

Example: pdepoly([-1 0 0 1 1 -1],[0 0 1 1 -1 -1])

Data Types: double

`label` — Name
character vector | string scalar

Name of the polygon, specified as a character vector or string scalar.

Data Types: char | string

Tips

pdepoly opens the PDE Modeler app and draws a polygon. If, instead, you want to draw polygons in a MATLAB figure, use the plot function, for example:
```
x = [-1,-0.5,-0.5,0,1.5,-0.5,-1];
y = [-1,-1,-0.5,0,0.5,0.9,-1];
plot(x,y,'.-')
```

Version History

Introduced before R2006a