### [igraph] Custom directed weighted bipartite graphs

Hi,

I have an incidence matrix, suppose it:

R1 R2 R3

A -1 0 -1

B 1 -1 0

C -1 -1 0

D 0 1 1

E 0 0 1

I would like to build a bipartite graph in igraph by following rules:

- Edge directions should be determined by sign, i.e. when matrix entry is negative then direction is row-to-column, if it is positive then inverse direction. For example in first column, A and C connect to R1 but R1 connects to B.

- Graph should allow m<-1 and m>1 matrix entries for example -2, 3, etc. If this is the case, I wonder does igraph evaluate them as weight or attribute?

Best wishes.

İbrahim Mutlay

Chief Science Officer

Grafen Chemical Industries

A Subsidiary of Hayzen Engineering Co.

24. cad. KA-CL Is Merkezi

No: 165/60 Ivedik OSB-Industrial Zone

06370 Ankara, TURKEY

www.grafen.com.tr

Phone/Fax: +90-312-3948109

Mobile: +90-535-3033507

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