Re: [R] big edge list to adjacency matrix

PM Subject: Re: [R] big edge list to adjacency matrix Hello, The following is a bit convoluted but will do it. dat <- read.table(text = " a1 b1 1 a2 b2 2 a3 b3 3 a1 b1 4 a3 b1 5 ") xtabs(V3 ~ V1 + V2, data = aggregate(V3 ~ V1 + V2, data = dat, FUN = max)) Hope this helps, Rui Bar

Re: [R] big edge list to adjacency matrix

Hello, The following is a bit convoluted but will do it. dat <- read.table(text = " a1 b1 1 a2 b2 2 a3 b3 3 a1 b1 4 a3 b1 5 ") xtabs(V3 ~ V1 + V2, data = aggregate(V3 ~ V1 + V2, data = dat, FUN = max)) Hope this helps, Rui Barradas Em 12-03-2013 21:45, avinash sahu escreveu: I have huge l

[R] big edge list to adjacency matrix

I have huge list of edges with weights. a1 b1 w1 a2 b2 w2 a3 b3 w3 a1 b1 w4 a3 b1 w5 I have to convert it into 2 dim matrix b1b2 b3 a1 max(w1,w4) 0 0 a20w2 0 a3w5 0 w3 if edges repeated take the maxim