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!null values in arrays [message #74050]

Wed, 15 December 2010 10:11

Gray
Messages: 253
Registered: February 2010

Senior Member

Hi all,

I was just wondering if anyone else would find it useful to have the
ability to store !null as elements in otherwise homogenous arrays.
Wouldn't this be a much more elegant way of encoding missing data than
using NaNs? Of course, a lot of functionality would have to change -
like, for example, one would have to be able to do

IDL> print, 3 + !null
3

instead of what actually occurs:

IDL> print, 3 + !null
% Variable is undefined: <UNDEFINED>

However, writing this post is worth it just to include that
tautological error message.

--Gray

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