[SciPy-user] matrix construction
J
josh8912 at yahoo.com
Fri Sep 24 20:12:39 CDT 2004
Hello Stephen:
I found something that might be of use. The Matlab
file "FindConnectedComponents.m" listed at
http://www.cs.tau.ac.il/~borens/courses/ml/code.html
might be what you are looking for. It takes an
adjaceny matrix as input and finds the connected
components.
Best, John
--- Stephen Walton <stephen.walton at csun.edu> wrote:
> On Thu, 2004-09-23 at 08:29, William Griffin wrote:
> > I'm trying to build an adjacency matrix (52*52)
>
> Maybe this is so obvious that I'm missing what
> you're trying to do:
>
> from string import *
> from numarray import *
> A=zeros((52,52)) # adjacency matrix
> file=open('data')
> for line in file.readlines():
> w = split(line)
> m = atoi(w[0])
> n = atoi(w[1])
> A[m, n] += 1
>
> I've gotten in the habit of using m,n instead of
> i,j, by the way because
> of i and j being the sqrt(-1) in MATLAB and
> Numeric/numarray,
> respectively.
>
> Now, does anyone have code to draw a connectivity
> graph from an
> adjacency matrix like this?
>
>
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