Dear all,

I'm a basic R user and would be very grateful for some help.
I have a filtered gene list of 1500 Affy probesets and run a simple correlation. Following a correlation threshold, I try to plot the graph using Rgraphviz. However, all 1500 probesets are plotted. How can I plot only those probesets that are correlated according to the set threshold, i.e. only those with an edge?

Many thanks for your help!

Cam


cor = cor(t(list))
diag(cor) = 0
selcor = abs(cor)>0.9

graph = as(selcor, Class = "graphNEL")
plot(graph, "neato")
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