2D plot of a surface defined by a function using colors
fgrayplot(x,y,f,[strf,rect,nax]) fgrayplot(x,y,f,<opt_args>)
real row vectors.
external of type y=f(x,y)
.
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
).
see plot2d
.
fgrayplot
makes a 2D plot of the surface given by z=f(x,y)
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 fgrayplot()
to see a demo.
t=-1:0.1:1; deff("[z]=my_surface(x,y)","z=x**2+y**2") fgrayplot(t,t,my_surface,rect=[-2,-2,2,2]) | ![]() | ![]() |