Name
grayplot — 2D plot of a surface using colors
Calling Sequence
grayplot(x,y,z,[strf,rect,nax])
grayplot(x,y,z,<opt_args>)
Parameters
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 and plot2d_old_version).
strf,rect,nax
see plot2d.
Description
grayplot creates 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. If z contains %nan values, the surrounding rectangles are not displayed. Enter the command grayplot() to see a demo.
Examples
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); clf() grayplot(t,t,m)
See Also
fgrayplot , plot2d , Sgrayplot , Sfgrayplot