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Re: LEAST SQUARE MATRIX [message #43040 is a reply to message #43027]

Wed, 09 March 2005 09:13

Matthias Demuzere
Messages: 9
Registered: April 2004

Junior Member

Sorry,
I had a formula typed in matthype in here, but I think its gone...

Here is my question again:
I have a dataset of temperatures taken at hourly steps (k-value) for a whole
month (i-value). Now, i would like to compare each temperature Tk,i with
every other Tk,j with j the same number of days as in i. i would like to do
that comparison by least square methods like this

Matrix Ai,j = sum (Tk,i-Tk,j)^2

where the matrix Ai,j is a symmetrical matrix (because i,j are the same
day).

How can that be done in IDL?
Tips, idees, everything is welcome...

Thanks,
Matthias

"Matthias Demuzere" <Matthias.demuzere@geo.kuleuven.ac.be> wrote in message
news:1110385467.646608@seven.kulnet.kuleuven.ac.be...
> Hi,
>
> Could anyone help me with the construction of a least square matrix in IDL
> indicated by A
>
> where i,j =1, 2,...,N
>
> Tips, idees, everything is welcome...
> Thank you!!
>
> Matthias
> --
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> Physical and Regional Geography Research Group
> Redingenstraat 16
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> Belgium
>
> Tel: +32 16 326453
> Fax: +32 16 326400
> E-mail: Matthias.Demuzere@geo.kuleuven.ac.be
>
>
>

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[Message index]

		least square matrix By: Matthias Demuzere on Fri, 11 March 2005 01:33
		Re: LEAST SQUARE MATRIX By: Matthias Demuzere on Wed, 09 March 2005 09:13
		Re: LEAST SQUARE MATRIX By: James Kuyper on Wed, 09 March 2005 08:53

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