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Re: Why doesn't this return the correct value? [message #58771 is a reply to message #58672]

Thu, 14 February 2008 03:25

Spon
Messages: 178
Registered: September 2007

Senior Member

> In terms of doing what you want to do, you should really look into
> using WHERE.
> IndexOfIndices = WHERE(Good_index GT 0, Number)
> Positive_Good_Index = Good_index[IndexOfIndices]
> Good_Indexed_Precip = Precip_Change[Positive_Good_Index]
>
> Take care,
> Chris

To avoid trying to subscript if you get an all negative array, protect
your code like this:

IndexOfIndices = WHERE(Good_index GT 0, Number)
IF Number GT 0 THEN BEGIN
Positive_Good_Index = Good_index[IndexOfIndices]
Good_Indexed_Precip = Precip_Change[Positive_Good_Index]
ENDIF

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		Re: Why doesn't this return the correct value? By: Spon on Thu, 14 February 2008 03:22
		Re: Why doesn't this return the correct value? By: Spon on Thu, 14 February 2008 03:25

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