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Re: help with idl [message #83194 is a reply to message #71738]

Thu, 07 February 2013 06:26

Helder Marchetto
Messages: 520
Registered: November 2011

Senior Member

On Thursday, February 7, 2013 3:13:36 PM UTC+1, fd_...@mail.com wrote:
> Does anyone know how to create a Toeplitz matrix in idl??
>
>
>
> Best Wishes
>
> Mar

Well, I'm not sure that this is what you are looking for and I don't think that this is the the "IDL" way, however it does the job:

IDL> n = 5
IDL> a = make_array(n,n)
IDL> OneLine = findgen(2*n)
IDL> FOR I=0,n-1 DO a[*,I] = (shift(OneLine,I))[0:4]
IDL> print, a
0.000000 1.00000 2.00000 3.00000 4.00000
8.00000 0.000000 1.00000 2.00000 3.00000
7.00000 8.00000 0.000000 1.00000 2.00000
6.00000 7.00000 8.00000 0.000000 1.00000
5.00000 6.00000 7.00000 8.00000 0.000000

Hope it helps.

Cheers,
h

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[Message index]

		Help with Idl+Envi By: MaxA on Fri, 16 July 2010 01:42
		Re: help with idl By: Brian Daniel on Thu, 07 February 2013 10:26
		Re: help with idl By: Brian Daniel on Thu, 07 February 2013 10:26
		Re: help with idl By: Helder Marchetto on Thu, 07 February 2013 06:28
		Re: help with idl By: Helder Marchetto on Thu, 07 February 2013 06:26

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