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Re: [ferret_users] Ferret 6.3: contour intervals with "lev=xD"

Hi all,

I'm also finding that "lev=xd" doesn't work in Ferret 6.3.

For example, I have a field containing annual-mean screen temperature in Kelvin:

yes? stat tscann

             Annual-mean screen temperature
             LONGITUDE: 2.8W(-2.8) to 2.8W(357.2)
             LATITUDE: 89.1S to 89.1N
             Z:  N/A
             T:  N/A
             DATA SET: ./stsc_i04_climats_00201-01200.nc

 Total # of data points: 3584 (64*56*1*1)
 # flagged as bad  data: 0
 Minimum value: 214.63
 Maximum value: 302.39
 Mean    value: 277.6 (unweighted average)
 Standard deviation: 21.392

When I attempt to shade this data using the command

yes? shade/lev=2d tscann

I find that Ferret 6.3 selects contour levels ranging from 492 to 580. As a result, I get a blank plot. The same shade command worked fine in earlier versions.

By the way, the new "lev=xv" and "lev=xh" options are fantastic - I think they'll rapidly prove to be invaluable!


Hi Ferreters,

I found that in Ferret 6.3, contour levels don't necessarily
cover the whole range when specified with lev=xD:

 $ ferret
         FERRET v6.3
         Linux(g77) 2.4.21-32 - 09/29/09
          6-Oct-09 09:00

 yes? set data coads_climatology
 yes? contour/l=1/lev=2D sst
 yes? contour/l=1 sst

With "lev=2D", the SST field is plotted only down to 14 degC,
missing high latitudes.

This problem may be a glitch introduced in Ferret 6.3;
Ferret 6.2 shows the whole temperature range.


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