From help-request at octave dot org Thu Jun  3 10:47:53 2004
Subject: syntax help: simple formula expansion (sub-indexes with vectors)
From: edA-qa mort-ora-y <eda-qa at disemia dot com>
To: help at octave dot org
Date: Thu, 03 Jun 2004 17:46:13 +0200

Although I've been working with octave for a little while now I am still 
having a lot of problems working with the most basic expressions.  Can 
somebody please indicate to me the prefered way to handle the below example.

Given these variables (not in octave notation to avoid confusion):
	l is a 2-space vector (ex. (4,5), in octave: [4,5])
	x is a 2-space vector
	h is a real number
	n is an integer
	i is the range of numbers [1,n]

I want to evalute the following function for every integer in i:

	d(i) = l + ( h/n * ( i + 0.5 ) ) * x
	
I want to create the variable d that has the result of the function for 
each element of i.  I try doing something like below, but I keep getting 
errors.

	l=[1,1];
	x=[0,1];
	h=6;
	n=3;
	i=1:n
	for q=i; d(q)=l-((h/n)*(q+0.5))*x; end

	error: A(I) = X: X must be a scalar or a vector with same length as I

How do I do this? (If possible it'd be nice not to use a loop, but since 
I can't even get the loop working I feel unqualified to find a better 
solution)

-- 
edA-qa mort-ora-y
Idea Architect
http://disemia.com/



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