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Re: matrix division [message #60435 is a reply to message #60434]

Thu, 22 May 2008 01:07

adam.ranson
Messages: 4
Registered: May 2008

Junior Member

Thanks for the quick response David! This is the way I'd
assumed it would be done but doesn't give me the numbers
back I'd expect. For example:

I = [[1, 2, 2],[2,1,1]]
C = [[8, 2, 8],[2,8,1]]
Z = I/C

IDL> print, z gives...
0 1 0
1 0 1

I want to divide 1 by 8, 2 by 2, 2 by 8, 2 by 2, 1 by 8 & 1 by 1.

Thanks again

Adam

On 21 May, 19:35, David Fanning <n...@dfanning.com> wrote:
> adam.ran...@bris.ac.uk writes:
>> I have a question about IDL 5.6 which I'm pretty new to... I seem to
>> remember having a similar problem in MatLab a while back too. I'm
>> trying to divide each of the elements in a 2D array by the elements in
>> 2nd 2D array of identical dimensions and put the result into 3rd
>> array. Is it possible to do this in one statement in IDL or do I have
>> to go through each item using a loop?
>
> I would try something like this:
>
> IDL> c = a / b
>
> 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.")

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[Message index]

		Re: matrix division By: David Fanning on Thu, 22 May 2008 05:59
		Re: matrix division By: David Fanning on Thu, 22 May 2008 05:55
		Re: matrix division By: jameskuyper on Thu, 22 May 2008 05:47
		Re: matrix division By: jameskuyper on Thu, 22 May 2008 05:42
		Re: matrix division By: d.poreh on Thu, 22 May 2008 05:40
		Re: matrix division By: David Fanning on Thu, 22 May 2008 05:29
		Re: matrix division By: d.poreh on Thu, 22 May 2008 05:24
		Re: matrix division By: David Fanning on Thu, 22 May 2008 05:13
		Re: matrix division By: David Fanning on Thu, 22 May 2008 05:08
		Re: matrix division By: adam.ranson on Thu, 22 May 2008 04:41
		Re: matrix division By: d.poreh on Thu, 22 May 2008 03:07
		Re: matrix division By: Nigel Wade on Thu, 22 May 2008 03:00
		Re: matrix division By: adam.ranson on Thu, 22 May 2008 01:07
		Re: matrix division By: David Fanning on Wed, 21 May 2008 11:35
		Re: matrix division By: jameskuyper on Thu, 22 May 2008 07:57

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