Hi,

I am working on some gene expression data and am trying to come up with a random
walk 
algorithm to cluster my data.

Here's what I need. I have a probability matrix of several genes against each
other. 
Assuming each one of the genes (columns and rows) on the probability matrix is a
node, I
am 
trying to write a script that reads in this matrix and performs one step random
walks 
between these nodes. The edges are weighted by the probabilities in the matrix.
I also
need 
it to create another matrix that keeps score of how many times a certain edge
gets walked.


I am rather new to PERL and have been doing most of my work on S-plus. If any of
you are 
familiar with this type of analysis or if you thik you might be able to help me,
given
more 
detail please let me know. 

Thank you,
Kalyan Dudala

Kalyan Chakravarthy Dudala
Graduate Assistant
Ecology, Evolutionary and Organismal Biology
Rm 339, Bessey Hall
Iowa State University
Ames, IA 50011



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