Scilab Reference Manual |
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grayplot — 2D plot of a surface using colors
grayplot(x,y,z,[strf,rect,nax]) grayplot(x,y,z,<opt_args>)
x,y | : real row vectors of size n1 and n2. |
z | : real matrix of size (n1,n2). z(i,j) is the value of the surface at the point (x(i),y(j)). |
<opt_args> | : This represents a sequence of statements key1=value1, key2=value2,... where key1, key2,... can be one of the following: rect, nax, strf or axesflag and frameflag (see plot2d). |
strf,rect,nax | : see plot2d. |
grayplot makes a 2D plot of the surface given by z on a grid defined by x and y. Each rectangle on the grid is filled with a gray or color level depending on the average value of z on the corners of the rectangle.
Enter the command grayplot() to see a demo.
x=-10:10; y=-10:10;m =rand(21,21); grayplot(x,y,m,rect=[-20,-20,20,20]) t=-%pi:0.1:%pi; m=sin(t)'*cos(t); xbasc() grayplot(t,t,m)
J.Ph.C.
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