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Re: How to do a "match merge"? [message #27594 is a reply to message #27593]

Thu, 25 October 2001 12:53

John-David T. Smith is currently offline

John-David T. Smith
Messages: 384
Registered: January 2000

Senior Member

Joe Means wrote:
>
> ;I have a structure:
> segment = {seg:0, piece:0, rotation:0.0, length:0.0}
> segments = Replicate(segment, 2000)
>
> ;then I read data to fill array segments. For each segment there can
> be 1 or more values of piece,
> ;so the data in segments can look like:
> segment piece rotation
> 1 1 1.3
> 1 2 5.7
> 2 1 4.4
> 2 2 3.4
> 2 3 5.5
> ......
>
> ;then I calculate length for each segment and put those values in a
> vector array whose index is equal to segment-1, so each length can be
> easily matched to each segment. My question is can I effeciently
> match the length values into the structure for each piece without
> looping? Statistical programming languages like SAS have match-merge
> capabilities so this kind of thing is simple, but I am not aware of
> similar capabilities in IDL.
>

Will

IDL> segments.length=seg_len_vec[segments.segment-1]

do what you want?

JD

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[Message index]

		Re: How to do a "match merge"? By: Dick Jackson on Thu, 25 October 2001 22:10
		Re: How to do a "match merge"? By: Joe Means on Thu, 25 October 2001 15:24
		Re: How to do a "match merge"? By: Pavel A. Romashkin on Thu, 25 October 2001 12:53
		Re: How to do a "match merge"? By: John-David T. Smith on Thu, 25 October 2001 12:53

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