printing grey scale with color overlay

[M.Mahakur]

Respected Users,

I can display the  grey scale shaded plots overlapped with color (for
non-zero) values using following few lines. As I wants to display all
the plots having observations and white out the UNDEF (i.e. no satellite
pass).  But, when 'display' the gmf (stored using print) using the
'gxtran' or PNG file from 'printim' displays all with colors (no grey)
i.e. it  does save in the files what it was in the display. How can I
over come this?

-----------------------------------
'set gxout shaded'
'set display greyscale'
'd rr'
*** DISPLAY IN GREY SHADES
'set display color'
'set clevs  0.1 0.5 2  3  4  5  7  9  12 15 20 25 30 35'
'set ccols  3   17  18 19 20 21 22 23 24 25 26 27 28 29 30 '
'd maskout(rr,rr-1.0e-33)'
**** DISPLAY NON-ZERO VALUES IN RGB COLORS
---------

Regards,

Mahakur