Missing grid fields in plot

Stefan Gofferje gradsusers at GOFFERJE.HOMELINUX.ORG
Fri May 2 20:30:15 EDT 2008

Hi all,

I am trying to plot the SWEAT index for the Nordic countries but
strangely, there are lots of grid fields just missing.

E.g. see

This is the math:

'define tc850mb = tmp850mb-273.16'
'define tc500mb = tmp500mb-273.16'
'define ttindex = tc850mb+dewp850mb-(2*tc500mb)'
'set lev 850'
'define f850mb = mag(ugrdprs,vgrdprs)*0.514'
'define dir850mb = ugrdprs'
'set lev 500mb'
'define f500mb = mag(ugrdprs,vgrdprs)*0.514'
'define dir500mb = ugrdprs'
'define sweatindex =

Does anybody have an idea why there are those fields just missing?
There are no error or warning messages in gradsc... (using opengrads 1.9RC1)

Greetings from Finland,
Stefan Gofferje

Since light travels faster than sound, is that why some people appear
bright until you hear them speak?

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