Create a 32×32 array Z, where Z(x,y) = exp(-((x/15)^2+(y/12)^2)) for -5 ≤ x ≤ 26 and -10 ≤ y ≤ 10. Display as a contour plot and as density plots.

The following script will perform the desired operations:

 generate x -5,,26 32
 generate y -10,,10 32
 matrix z 32 32
 do j=[1:32]
   do k=[1:32]
     z[k,j] = exp(-((x[j]/15)^2+(y[k]/12)^2))
   enddo
 enddo
 window 5
 contour\legend x y z 20
 window 6
 set colormap thermal
 density x y z
 window 7
 density\diffusion x y z
 window 8
 density\dithering x y z
 

Read 32×24 elevation data from file e.dat.
Display as a contour map and as density plots.

 read\matrix e.dat elevation 32 24
 window 5
 contour\legend elevation 15
 window 6
 set colormap topo256
 density elevation
 window 7
 set colormap gray256
 density elevation
 window 8
 density\diffusion elevation
 

  Analyze data using FFT
  Plot parametric functions