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Re: Question about the TOTAL function. [message #43540 is a reply to message #43539]

Fri, 15 April 2005 09:08

James Kuyper
Messages: 425
Registered: March 2000

Senior Member

Nuno Oliveira wrote:
> I have a question that somebody that works with IDL many had faced before.
> Imagine I have a matrix(X,Y), no matter the type of variable, and if want na
> array with the projection along de x axis, something like
>
>
>
> for i = 0, n-1 do $
>
> SUMX = TOTAL(i, *)

; I presume you mean
sumx[i] = TOTAL(matrix[i,*])

> How can I do it without the FOR cicle.

sumx = TOTAL(matrix, 2)

; Similarly, if you want to calculate
sumy[j] = TOTAL(matrix[*,j])

; you can just use:
sumy = TOTAL(matrix,1)

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[Message index]

		Re: Question about the TOTAL function. By: Benjamin Hornberger on Fri, 15 April 2005 09:38
		Re: Question about the TOTAL function. By: James Kuyper on Fri, 15 April 2005 09:08
		Re: Question about the TOTAL function. By: rexford.newbould on Fri, 15 April 2005 09:05

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