From bug-octave-request at bevo dot che dot wisc dot edu Sun Jan  5 18:14:46 2003
Subject: Operations on matrix referenced by a list of indices
From: =?iso-8859-2?Q?Igor_=D0ukanovi=E6?= <igor dot mat at uni-mb dot si>
To: bug-octave at bevo dot che dot wisc dot edu
Date: Sun, 5 Jan 2003 17:48:59 -0600

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Let A be a vector or a matrix. (e.g. A=[ 1 2 3 4 5]).
Statement
A([ 1 2]) = [ 7 8];
does
A(1)=7; A(2)=8;
and that's good.
Statement
A([1 1])= [ 8 9];
does
A(1) = 9;
and that's good, too.

However statement
A([ 1 1])= A([1 1]) + [ 8 9];
does (same as in Matlab)
A(1) = A(1) + 9;
and that's bad.  I want it to do
A(1) = A(1) + 8; A(1)=A(1) + 9;
producing 
A(1)=A(1)+8+9;
otherwise I would not include 1 in index list twice.
Is my wish in conflict with other functions written in octave?

Best regards,
                      igor dukanovic

P.S.  Info:  octave-2.1.36 
Windows 98 on Pentium

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