[SciPy-user] matrix construction

[William Griffin]

I'm trying to build an adjacency matrix (52*52) from an imported ASCII list.  I want to be able to construct and read the list as two columns [i] [j], and use a count method to obtain the tally cell values for the occurrences and include the count value in the [i,j] cell; or else, bring in the list as three columns [i][j][tallies], and then simply place the [tallies] value in the [i,j] cell.  I prefer the former two column approach because it involves one less step.  I've made several attempts at generating a general algorithm, but it has not been very successful.  I was wondering anyone else had to do this or can point me to any code that might be adapted for this.

 

Thanks,

Bill Griffin