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Re: Assigning the values of a matrix to a larger matrix [message #88470 is a reply to message #88468]

Wed, 30 April 2014 16:05

Fabrice Lambert
Messages: 6
Registered: March 2012

Junior Member

Hello Heinz,

That works, thanks a lot!

I find it very counter-intuitive, though: In my example to fill in the values we want in the 3rd dimension of the base vector, we have to create a 4th dimension where every index contains a copy of the original 3d-input vector.

Is there an easy way to understand that logic?

Thanks,
Fabrice

On Wednesday, April 30, 2014 5:21:35 PM UTC-4, Heinz Stege wrote:
> Hello Fabrice.
>
>
>
>
>
>
>> Is there a way to write the following code in IDL/GDL without a for loop?
>
>>
>
>> for i=0,90 do begin
>
>> Base[*,*,i]=Input[*,*,0]
>
>> endfor
>
>
>
> Yes, you can write:
>
>
>
> n=size(input,/dimensions)
>
> base[0,0,0]=rebin(input,[n,91],/sample)
>
>
>
> If the base array does not have to be bigger than the 91x input
>
> array, you don't need to create it explicitly and can more simply
>
> write:
>
>
>
> n=size(input,/dimensions)
>
> base=rebin(input,[n,91],/sample)
>
>
>
> Cheers, Heinz

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[Message index]

		Assigning the values of a matrix to a larger matrix By: Fabrice Lambert on Wed, 30 April 2014 13:52
		Re: Assigning the values of a matrix to a larger matrix By: Heinz Stege on Wed, 30 April 2014 14:21
		Re: Assigning the values of a matrix to a larger matrix By: Fabrice Lambert on Wed, 30 April 2014 16:05
		Re: Assigning the values of a matrix to a larger matrix By: Heinz Stege on Fri, 02 May 2014 11:16
		Re: Assigning the values of a matrix to a larger matrix By: Fabrice Lambert on Fri, 02 May 2014 16:51
		Re: Assigning the values of a matrix to a larger matrix By: Fabrice Lambert on Wed, 07 May 2014 09:35
		Re: Assigning the values of a matrix to a larger matrix By: Heinz Stege on Wed, 07 May 2014 10:51
		Re: Assigning the values of a matrix to a larger matrix By: Fabrice Lambert on Wed, 07 May 2014 16:40

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