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grayplot Scilab Group Scilab Function grayplot
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).
strf,rect,nax
: see plot2d.
DESCRIPTION
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.
EXAMPLE
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)
SEE ALSO
fgrayplot, plot2d, Sgrayplot, Sfgrayplot
AUTHOR
J.Ph.C.
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