[igraph] Using iGraph for correlated abundances

[Tim Richter-Heitmann]

Hi there,

i have a very basic question. I want to plot my large abundance data 
according to simple pairwise x,y pearson and/or spearman correlation.
I have used qgraph so far, but it cannot filter for non-significant 
p-values (it can either display significant observations or correlation 
strengths, but not both).
My question is, can iGraph do that by omitting non significant values at 
all?
I just recently delved into network analysis, from what ive seen on the 
net, the graph.adjacency is the most common way to do so, and ive seen 
examples for
deleting edges not meeting tresholds, but ive not seen the significancy 
covered yet.
Also fine would be coloring according to cor-strength, label width 
according to significancy level (or vice versa).
Any example code is very welcome. Thank you very much!

Tim