From help-request at octave dot org Tue Feb  8 12:39:19 2005
Subject: Re: indexing in octfile
From: "Paul Thomas" <paulthomas2 at wanadoo dot fr>
To: "Brian Blais" <bblais at bryant dot edu>, <help@octave.org>
Date: Tue, 8 Feb 2005 19:44:50 +0100

Brian,

The class functions insert,

Matrix & insert (const Matrix &a, int r, int c)
Matrix & insert (const RowVector &a, int r, int c)
Matrix & insert (const ColumnVector &a, int r, int c)
Matrix & insert (const DiagMatrix &a, int r, int c)


fill

Matrix & fill (double val, int r1, int c1, int r2, int c2)


and extract

Matrix extract (int r1, int c1, int r2, int c2) const 
Matrix extract_n (int r1, int c1, int nr, int nc) const 


do what you want, rather more naturally than assignment.

Paul T



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