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Re: chunk indexing like [message #69316 is a reply to message #69314]

Sat, 09 January 2010 08:50

rogass
Messages: 200
Registered: April 2008

Senior Member

On 9 Jan., 16:10, David Fanning <n...@dfanning.com> wrote:
> Wox writes:
>> I know how to get
>> from [2,3,1,0,5] to [0,0,1,1,1,2,4,4,4,4,4] (i.e. chunk indexing)
>> but how do I get
>> from [2,3,1,0,5] to [0,1,0,1,2,0,0,1,2,3,4]
>> without loops that is.
>
>> I have been juggling with histogram and total(.../cumulative) but I
>> can figure this one out.
>
> Here is my problem with this, and with Chris's answers:
> is this an intellectual exercise, or is there a reason
> for wanting to do something like this? :-(
>
> Cheers,
>
> David
>
> --
> David Fanning, Ph.D.
> Fanning Software Consulting, Inc.
> Coyote's Guide to IDL Programming:http://www.dfanning.com/
> Sepore ma de ni thui. ("Perhaps thou speakest truth.")

David,
I will take this approach to address the different features within my
varying spectral feature database. So, it helps me too. Nevertheless,
the problem was interesting for me, because it also touches somehow
the missing possibility of IDL to do (arr
[indexarray1:indexarray1+x,indexarray3:indexarray3+y])[*]

However, I assumed that WOX wanted help or searched for a different
approach due to his/her problem. Some people here - especially you and
your website - helped me and so I try to help others too if I can. It
would be wonderful, if ITTVIS would reflect or solve the most common
problems posted to this newsgroup in their upcoming IDL releases.

Regards

CR

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[Message index]

		Re: chunk indexing like By: David Fanning on Sun, 10 January 2010 08:09
		Re: chunk indexing like By: Wout De Nolf on Sun, 10 January 2010 08:05
		Re: chunk indexing like By: David Fanning on Sun, 10 January 2010 07:07
		Re: chunk indexing like By: Wout De Nolf on Sun, 10 January 2010 05:52
		Re: chunk indexing like By: Wout De Nolf on Sun, 10 January 2010 05:09
		Re: chunk indexing like By: Wout De Nolf on Sun, 10 January 2010 04:22
		Re: chunk indexing like By: rogass on Sat, 09 January 2010 11:07
		Re: chunk indexing like By: David Fanning on Sat, 09 January 2010 09:53
		Re: chunk indexing like By: rogass on Sat, 09 January 2010 08:50
		Re: chunk indexing like By: David Fanning on Sat, 09 January 2010 07:10
		Re: chunk indexing like By: rogass on Sat, 09 January 2010 02:15
		Re: chunk indexing like By: rogass on Sat, 09 January 2010 01:37
		Re: chunk indexing like By: pgrigis on Fri, 08 January 2010 08:16
		Re: chunk indexing like By: Wout De Nolf on Fri, 08 January 2010 06:12

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