I want to take some snapshot of the evolving Fruchterman-Reingold layout, to get a feeling of how the layout is evolving. First I thought I could do some steps, draw the layout, and put the already calculated positions back to the layout.fruchterman.reingold via the start argument.
It doesn't work because the initial heat can not be adjusted. Maybe the documentation lacks some information. I am using igraph version 0.7.1.
Thanks in advance!
Unfortunately this is not supported by the implementation of the Fruchterman-Reingold layout in igraph. If you feel adventurous, you can tweak the source code of the C core of igraph (in particular,
src/layout.c) to log the coordinates after each iteration in the layout, but that requires recompiling the library from scratch.