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Re: indices of zeros in matrix
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From: |
Geraint Paul Bevan |
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Subject: |
Re: indices of zeros in matrix |
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Date: |
Thu, 10 Jul 2003 10:00:55 -0500 |
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User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4) Gecko/20030624 |
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bertrand roessli wrote:
| Hello,
|
| does anybody know if there is a function which returns
| the indices of all zero elements in a matrix?
|
| thank you
|
Bertrand,
you can use the "find" function:
octave:1> a = [ 1 , 0 , 3 ; 0 , 5 , 6 ; 0 , 0 , 9 ]
a =
~ 1 0 3
~ 0 5 6
~ 0 0 9
octave:2> find ( a == 0 )
ans =
~ 2
~ 3
~ 4
~ 6
Note that fortran-style indices are given.
- --
Geraint Bevan
Department of Mechanical Engineering
University of Glasgow
Tel: +44 (0)141 330 5917
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