Thread Subject: Problem with indexing!

I've a problem with finding the index in a single vector.
i've calculated some parameters for a document for some
values of theta ranging from -15 to +15 in steps of 5. that
means

1col -15
2col -10
3col -5
4col 0
5col 5
6col 10
7col 15

i find the maximum value out of these, but i dunno how to
get back the angle correspondingly using the positive matrix
indices. i.e., if the column number i get is 3rd, how do
calculate the actual -5?

Do reply!

"Archana Ananthanarayan" <archana1985_ms@hotmail.com> wrote
in message <g28dd6$1st$1@fred.mathworks.com>...
>
> I've a problem with finding the index in a single vector.
> i've calculated some parameters for a document for some
> values of theta ranging from -15 to +15 in steps of 5.
that
> means
>
> 1col -15
> 2col -10
> 3col -5
> 4col 0
> 5col 5
> 6col 10
> 7col 15
>
> i find the maximum value out of these, but i dunno how to
> get back the angle correspondingly using the positive
matrix
> indices. i.e., if the column number i get is 3rd, how do
> calculate the actual -5?
>
> Do reply!
>

% I'm not exactly sure what you are trying to do
% or what you mean by "maximum", but
% maybe this will get you started:

theta = (-15:5:15)'
index = find(theta==-5) % or the "maximum" value is:
%index = find(theta==max(theta))
theta(index)

% Does this help?