Scilab Function

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:

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        | /| /|
        |/_|/_|
        | /| /|
        |/_|/_|

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.