How to mask the data

["Yogesh K. Tiwari" <ktiwari@xxxxxxxxxxxxxxx>]

Hello Ferret Users,

I have point data which looks in ferret as :-


title         I        J      K        L

CO2_sat      --       --      --    1:1860206

nchan        --       --      --    1:1860206

lat          --       --      --    1:1860206

lon          --       --      --    1:1860206

time         --       --      --    1:1860206


Here the values of the variable 'nchan'(number of channel) is varying 
between 2 to 18.

Now my problem is :-

I want to plot the co2_sat with other variables when nchan=18 only
and rest values I want to mask.

Is it possible to do this inside the ferret ?

Many thanks in advance for the help.

Regards,
Yogesh



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Yogesh K. Tiwari,
Max-Planck Institute for Biogeochemistry,
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