Dear list,
I have the following two straightforward issues. I Have a dataset of
connections between companies (-having a deal together).
The edglist would look something like:
'COMP 1' -- 'COMP 2'
'COMP 1' -- 'COMP 3'
'COMP 2' -- 'COMP 4'
'COMP 1' -- 'COMP 3'
'COMP 5' -- 'COMP 6'
'COMP 1' -- 'COMP 3'
'COMP 1' -- 'COMP 2'
et cetera, for a few thousand vertices (between 800 and 2500, depending
on the continent)
It happens frequently that the same companies engage in multiple deals
together, but each deal is represented by a line in my data. As a
result, you see that 'COMP 1' -- 'COMP 2' occurs twice.
I would like to be able to collapse this to a weighted edge list where
'COMP 1' -- 'COMP 2' occurs only once but with value 2, 'COMP 1' --
'COMP 3' occurs only once having value 3, et cetera.
There must be a very simple way of doing this, but how?
Second, each company has several attributes, including industry. One of
the things I would like to do is to collapse the entire
company*company network into a weigted industry*industry network. This
would reduce the network from approx. 2000*2000 to 40*40.
How can I construct such a weighted network in igraph?
thank you,
Peter Verbeet
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