Comment on Checks for Missing Data Values

Hello,

Just a comment about how some of the NCL functions
handle missing values.

I work with data where the "missing_value" is usually
set, but the "_FillValue" may not be.

Some of the NCL functions check only for the existence
of "_FillValue", such as the stat_dispersion() function
(in file contributed.ncl).

Maybe these routines could be improved by using the
function getFillValue(), in logic such as this:

OLD LOGIC:
if( isatt(foo,"_FillValue") )then

NEW LOGIC:
if( getFillValue(foo) .ne. "No_FillValue" )then

Bruce
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Received on Fri Aug 26 09:22:25 2011