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Re: IDL-way to use WHERE result as subscripting indices without having to do IF count [message #76186 is a reply to message #76185]

Fri, 20 May 2011 06:16

penteado
Messages: 866
Registered: February 2018

Senior Member
Administrator

On May 20, 10:06 am, Robin Wilson <ro...@rtwilson.com> wrote:
> Array = 2
> Array
> 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.

Array[WHERE(Input LT 5,/null)] = 2
Array[WHERE(Input GT 7 AND OtherArray LT 9,/null) = 6

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[Message index]

		Re: IDL-way to use WHERE result as subscripting indices without having to do IF count By: Heinz Stege on Fri, 20 May 2011 08:22
		Re: IDL-way to use WHERE result as subscripting indices without having to do IF count By: David Fanning on Fri, 20 May 2011 06:27
		Re: IDL-way to use WHERE result as subscripting indices without having to do IF count By: David Fanning on Fri, 20 May 2011 06:19
		Re: IDL-way to use WHERE result as subscripting indices without having to do IF count By: Robin Wilson on Fri, 20 May 2011 06:18
		Re: IDL-way to use WHERE result as subscripting indices without having to do IF count By: penteado on Fri, 20 May 2011 06:16

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