From help-request at octave dot org Wed Jan 18 11:58:36 2006
Subject: Toy NDArray example
From: Keith Goodman <kwgoodman at gmail dot com>
To: octave help mailing list <help at octave dot org>
Date: Wed, 18 Jan 2006 11:53:36 -0600

I'm trying, for the first time, to port a m-file to an oct-file.

I got stuck on NDArrays. Are there any toy examples around that I can
copy? All I can find are long functions that I cannot follow.

Here's my own (unsuccessful) attempt at a toy NDArray example:

#include <oct.h>
	
DEFUN_DLD(ndarraytest, args, nargout, "I have no idea what I am doing.")
{
	// input matrix x is 3D
	NDArray x = args(0).array_value();

	// n3 is size(x,3).
	n3 = ???;
		
	// I would like to loop over the 3rd dimension of x
	for (int i=0; i < (n3-1); i++) {
		y(:,:,i) = inv(x(:,:,i));		
	}

	// Now return y
	octave_value_list retval;
	retval.append(y);
	return retval;
}



-------------------------------------------------------------
Octave is freely available under the terms of the GNU GPL.

Octave's home on the web:  http://www.octave.org
How to fund new projects:  http://www.octave.org/funding.html
Subscription information:  http://www.octave.org/archive.html
-------------------------------------------------------------