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IDL-way to use WHERE result as subscripting indices without having to do IF count [message #76188]

Fri, 20 May 2011 06:06

Robin Wilson
Messages: 40
Registered: August 2010

Member

Hi all,

I'm sure this has been discussed before, but I can't find the
discussion. I have a lot of code that looks like the following:

Array[WHERE(Input LT 5)] = 2
Array[WHERE(Input GT 7 AND OtherArray LT 9) = 6
etc...

I know I shouldn't be using WHERE like that without checking the count
of items returned, as it will crash if there are no values in Input less
than 5. My question is: is there an IDL-way to do this, without putting
in loads of IF count NE 0 statements above each of the assignemnts?
That'll make the code a lot longer, a lot messier etc.

Any ideas?

Cheers,

Robin

------------------
Robin Wilson
A PhD student studying complexity in remote sensing
www.rtwilson.com/academic

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IDL-way to use WHERE result as subscripting indices without having to do IF count

By: Robin Wilson on Fri, 20 May 2011 06:06

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