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Re: about MIN of 2D array [message #32714 is a reply to message #32713]

Mon, 28 October 2002 13:58

mchinand
Messages: 66
Registered: September 1996

Member

In article <apk9t5$6pr$1@dipsy.missouri.edu>,
Julia <julia65201@yahoo.com> wrote:
> hi, there,
>
> I have a queation about MIN.
>
> If I have a 2-dimension array, I want to get the value and position of
> minimum on each row. Is there a function in IDL can do this?
>
> Since for loop is not time efficient, so it is not suggested here.
>
> Any suggestion will be apprecaited.
>
> Regards,
>
> Julia
>
>

In IDL 5.5 you can do:

min_row=min(array,index,dimension=1)

min_row will contain the min of each row and index will give the index of
the min. The index value will be from 0 to number of elements in the
array. If you want the column number that contains the minimum value for
each row you can use:

row_index= index mod n_cols

where n_cols is the number of columns in your array.

Hope that helps,

--Mike

--
Michael Chinander
m-chinander@uchicago.edu
Department of Radiology
University of Chicago

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		Re: about MIN of 2D array By: Julia on Mon, 28 October 2002 16:20
		Re: about MIN of 2D array By: mchinand on Mon, 28 October 2002 13:58

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