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## syntax help: simple formula expansion (sub-indexes with vectors)

**From**: |
edA-qa mort-ora-y |

**Subject**: |
syntax help: simple formula expansion (sub-indexes with vectors) |

**Date**: |
Thu, 03 Jun 2004 17:46:13 +0200 |

**User-agent**: |
Mozilla Thunderbird 0.6 (X11/20040502) |

`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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**syntax help: simple formula expansion (sub-indexes with vectors)**,
*edA-qa mort-ora-y* **<=**