From help-request at octave dot org Wed Jun 22 10:08:37 2005
Subject: Re: beginner question: returning matrix and other
From: Quentin Spencer <qspencer at ieee dot org>
To: Jeff Abrahamson <jeff at purple dot com>
CC: help at octave dot org
Date: Wed, 22 Jun 2005 10:05:05 -0500

Jeff Abrahamson wrote:

>I have a function that wants to return a matrix and a scalar.  The
>most obvious way to do this doesn't work.  Am I missing something?
>Using cell's seems overkill.
>
>    octave:45> a=ones(2,2)
>    a =
>
>      1  1
>      1  1
>
>    octave:46> b=3
>    b = 3
>    octave:47> [a,b]
>    error: number of rows must match (1 != 2) near line 47, column 4
>
>  
>
The command "[a,b]" is trying to concatenate the matrices a and b, which
are different sizes in your example. On the other hand, something like
"[a,b] = myfunc(c)" returns a and b as outputs of the function myfunc if
the function myfunc is defined. Try the following example:

function [output1, output2] = myfunc(input);
output1 = ones(2,2);
output2 = input;
endfunction

Entering "[a,b] = myfunc(3)" should return the values of a and b you
gave in your example.

Hope this helps.

-Quentin



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