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polygonplot

  

create a plot of one or more polygons

 

Calling Sequence

Parameters

Description

Examples

Calling Sequence

polygonplot(L, options)

polygonplot(A, options)

polygonplot(v1, v2, options)

Parameters

L

-

list of polygon vertices, each given as a two-element list

A

-

n by 2 Matrix, where n is any positive integer

v1, v2

-

Vectors of the same length

options

-

(optional) equations of the form option=value, where option is any of the available plot options 

Description

• 

The polygonplot command is used to create a 2-D plot of a polygon. The polygon's vertices are provided as the list L, the Matrix A, or the Vectors v1 and v2.

• 

The list L must contain 2-element lists or Vectors [x, y], each representing the numeric x- and y-coordinates of a vertex.

• 

The Matrix must be n by 2, where n is any positive integer. Each row of the Matrix contains the x- and y-coordinates of a vertex. If a 2 by n Matrix is given, with n not equal to 2, then it will be automatically transposed. The Vectors, representing the x-coordinates and the y-coordinates of the vertices respectively, can have any length, but both must have the same length.

• 

If you have a very large number of points, it is recommended that you provide the data as a Matrix with datatype set to float.

• 

Remaining arguments are interpreted as options which are specified as equations of the form option = value. These options are the same as those available for the plot command, as described in plot options.

• 

Multiple polygons may be plotted by providing a list containing polygons in the list or Matrix form, as described above. In this case, the color option value can be a list of n colors, where n is the number of polygons.

Examples

withplots:

ngonn→seqcos2πin,sin2πin,i=1..n:

displaypolygonplotngon8,color=blue,textplot0,0,Octagon,axes=none

one_polyMatrix0,0,0,1,0.5,0.5,1,1,1,0.05,0.95,0.05,0.95,0,datatype=float:

polygonplotone_poly,axes=boxed,colour=Magenta,transparency=0.7,gridlines

The command to create the plot from the Plotting Guide is

poly0,1,0,2,0.5,2.75,1.25,3,2,2.75,2.5,2.25,1.75,1.5,2.5,0.75,2,0.25,1.25,0,0.5,0.25

poly:=0,1,0,2,0.5,2.75,1.25,3,2,2.75,2.5,2.25,1.75,1.5,2.5,0.75,2,0.25,1.25,0,0.5,0.25

(1)

polygonplotpoly,axes=boxed,color=DarkGreen,transparency=0.5

The style option controls how the polygon is drawn.  In the next example, the same polygon is drawn without the border.

polygonplotpoly,axes=boxed,color=DarkGreen,transparency=0.5,style=polygon

See Also

Matrix

plot

plot/color

plot/option

plot/style

plots/polygonplot3d

plots/polyhedraplot

 


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