Sfgrayplot - smooth 2D plot of a surface defined by a function using colors

Calling Sequence

Sfgrayplot(x,y,f,[strf,rect,nax])

Description

Sfgrayplot is the same as fgrayplot but the plot is smoothed. The function fec is used for smoothing. The surface is plotted assuming that it is linear on a set of triangles built from the grid:

    ______ 
    | /| /| 
    |/_|/_|  
    | /| /|
    |/_|/_|
   

Enter the command Sfgrayplot() to see a demo.

Examples

t=-1:0.1:1;
deff("[z]=surf(x,y)","z=x**2+y**2")
Sfgrayplot(t,t,surf,"111",[-2,-2,2,2])
 

See Also

fec  fgrayplot  grayplot  Sgrayplot  

Author

J.Ph.C.