On Mon, 22 Nov 2004, Hector Ayala-del-Rio wrote:
> I have a data matrix that represents the similarities between a
> group of items
>
> A B C D E F G
> A 1
> B 1
> C 1
> D 1
> E 1
> F 1
> G 1
>
>
> I will like to extract all the similarity values for one particular
> item. Let say I will like to extract the similarity values of item C
> against all the other items. I will have to extract the values on C
> horizontaly until you reach the diagonal and then the values down.
> How can I do this in perl considering that the position of C could
> vary depending on the dataset. I have to do this extraction many
> times, this is why I am thinking on a perl script.
Splendid.
Have you started writing it yet?
Do you need help with it or something?
This list isn't a free script writing service, so if you don't have any
code to demonstrate, we really can't help you.
You may want to take a look at the book _Mastering Algorithms with
Perl_; chapter seven deals with matrices, and sample code for the book
is available on O'Reilly's web site:
<http://www.oreilly.com/catalog/maperl/>
<http://examples.oreilly.com/maperl/>
You may also want to look at modules like Math::Matrix:
<http://search.cpan.org/~ulpfr/Math-Matrix-0.4/Matrix.pm>
<http://search.cpan.org/search?query=matrix&mode=all>
If you have specific questions, feel free to ask the list.
--
Chris Devers
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