Force graphic to be written to file

Dear NCL users,

I'm making some plots in postscript (.ps) format with gsn_csm_xy and
gsn_csm_pres_hgt commands.

After every plot command I convert the .ps file to .epsi with ps2epsi in
order to crop out white page bounds. For example,

   res = True
   res@cnFillOn = True
   res@cnLinesOn = False
   res@lbOrientation = "Vertical"
   res@vpHeightF = 0.2 ;0.3
   res@vpWidthF = 1.0 ;0.4
   res@gsnMaximize = True
   res@gsnPaperOrientation = "portrait"
   time_axis_labels(time,res,restick)
   ...
   wks = gsn_open_wks("ps", "agcm_uvel")
   gsn_define_colormap(wks,"rainbow")
* plot = gsn_csm_pres_hgt(wks,uvel,res)*
* system("ps2epsi agcm_uvel.ps <http://agcm_uvel.ps> agcm_uvel.eps")*

For every "system(ps2epsi ...)" command I get a "blank page!!" message from
ps2epsi. The conversion from .ps to .epsi is not made, although I get valid
.ps files.

However, if I put all "system(ps2epsi ...)" after the sequence of
gsn_csm_pres_hgt commands, all but the last conversion works properly.

The last plot in script converts without problems when I run ps2epsi
outside my NCL script, after I have run it.

It seems that the graphic is not saved to file until the next plot command
or until the end of script execution.

I'd like to know how to address this issue. Is there a command I can use
just after every plot command to force NCL write the graphic to file?

Cheers,

-- 
Paulo Santiago
Ph.D. Student in Meteorology
Brazilian National Institute for Space Research
Phone.: +55(12)31868637

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Received on Mon Dec 9 08:12:07 2013