[igraph] Constraint

[Amanda Schierz]

Hi

Can Burt's Structural Holes Constraint be conducted on an undirected graph? 

I ran Constraint on an undirected graph and the results were opposite to what I expected, as in High transitivity meant low constraint and vice versa. I then thought that maybe Constraint can't be calculated for an undirected graph,

Many thanks, as always

Mandy

The Institute of Cancer Research: Royal Cancer Hospital, a charitable Company Limited by Guarantee, Registered in England under Company No. 534147 with its Registered Office at 123 Old Brompton Road, London SW7 3RP.

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[Tamás Nepusz]

Dear Mandy,

As far as I know, Burt's constraint scores can be calculated on an undirected graph without problems; even the R manual page for the constraint() function uses an undirected graph in the example:

http://igraph.sourceforge.net/doc/R/constraint.html

If you think you are getting incorrect results, feel free to send me the graph you are working with and I'll take a look at it.

Best,
Tamas

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