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Re: search routine [message #54242 is a reply to message #12851]

Fri, 01 June 2007 06:34

cmancone
Messages: 30
Registered: May 2007

Member

On Jun 1, 9:11 am, Paolo Grigis <pgri...@astro.phys.ethz.ch> wrote:
> Laurens wrote:
>> Hi folks,
>
>> From Martin Schultz (posted in 1999) I found the following array-search
>> algorithm which seems to do a fine job.
>> Except that i'm not able to catch the first element in the array.
>
>> Example:
>
>> Array = [0,80,100,120,180,300]
>> result = search, Array, 4.53
>
>> It should return index 0, if I understand it correctly, but it returns 1
>> instead. Now I don't quite follow the logic of the function, so maybe
>> someone for which it's easy to see can help me in the right direction?
>
> You could use the built-in function value_locate instead:
>
> result=value_locate(array,4.53)
>
> which returns 0.
>
> Ciao,
> Paolo

Actually, that's not so good. It assumes your array is always
increasing, and positive. If you used positive values, you would find
that my above example would report the index AFTER where the value
appears...

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[Message index]

		Search routines By: bowman on Fri, 18 September 1998 00:00
		Re: Search routines By: Martin Schultz on Mon, 21 September 1998 00:00
		Re: Search routines By: R. Bauer on Sat, 26 September 1998 00:00
		Re: search routine By: Laurens on Fri, 01 June 2007 06:42
		Re: search routine By: Paolo Grigis on Fri, 01 June 2007 07:27
		Re: search routine By: Laurens on Fri, 01 June 2007 06:38
		Re: search routine By: cmancone on Fri, 01 June 2007 06:34
		Re: search routine By: Paolo Grigis on Fri, 01 June 2007 07:23
		Re: search routine By: cmancone on Fri, 01 June 2007 06:32
		Re: search routine By: Paolo Grigis on Fri, 01 June 2007 07:20
		Re: search routine By: Paolo Grigis on Fri, 01 June 2007 06:11

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