[ferret_users] counting available data points

To: Ferret Usergroup <ferret_users@xxxxxxxx>

Subject: [ferret_users] counting available data points

From: Prakya Shree Ram <srprakhya@xxxxxxxxx>

Date: Wed, 25 Jan 2012 04:54:36 -0800 (PST)

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Reply-to: Prakya Shree Ram <srprakhya@xxxxxxxxx>

Sender: owner-ferret_users@xxxxxxxx

Hello,

I have a data file which shows in ferret as follows:

    1> ./avhrr_v5data.cdf (default)
name     title                             I         J         K         L
TEMP     SEA_SURFACE_TEMPERATURE[D=1]-27 1:49      1:49      ...       1:729
QUALITY_LEVEL
          SST measurement quality          1:49      1:49      ...       1:729

I want to calculate the number of data points available for variable TEMP (for l=1,2....) when QUALITY_LEVEL is above some value (say 4). Any idea how to do this in ferret.

Thanks in advance and Regards,

Sriram