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Re: Array comparison part 2 [message #32393 is a reply to message #32390]

Fri, 04 October 2002 07:20

James Kuyper
Messages: 425
Registered: March 2000

Senior Member

Chia Chang wrote:
>
> "Dick Jackson" <dick@d-jackson.com> wrote in message news:<oj_m9.473388$f05.21183164@news1.calgary.shaw.ca>...
...
> I like the 'where' function, below is how I would
> implement it to solve your particular problem:
>
> ------------------start test.pro-------------------
> pro test
>
> time0 = systime(1)
>
> a = indgen(2,25)
> b = [4,5]
>
> ;########################################
> ; PERFORM COMPARISON
> ;########################################
> xloc = where (a(0,*) EQ b[0])
> yloc = where (a(1,*) EQ b[1])
>
> ;########################################
> ; RETURN RESULTS
> ;########################################
> if xloc EQ yloc then begin
> print, 2, xloc
> endif else begin
> print, "No Match"
> endelse

Unless I'm missing something, that doesn't handle correctly the
possibility that there might be multiple matches, much less the
possibility that there might be a different set of matches for xloc than
for yloc. Of course, that possibility doesn't arise in your test data,
but it doesn't seem to be ruled out by the original problem description.

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[Message index]

		Re: Array comparison part 2 By: JD Smith on Fri, 04 October 2002 13:04
		Re: Array comparison part 2 By: tam on Fri, 04 October 2002 10:21
		Re: Array comparison part 2 By: Dick Jackson on Fri, 04 October 2002 08:46
		Re: Array comparison part 2 By: James Kuyper on Fri, 04 October 2002 07:20
		Re: Array comparison part 2 By: tam on Fri, 04 October 2002 06:58
		Re: Array comparison part 2 By: chia on Thu, 03 October 2002 17:27
		Re: Array comparison part 2 By: Dick Jackson on Thu, 03 October 2002 09:33

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