正确绘制R中的大邻接矩阵

I've got a rather large (but quite sparse) adjacency matrix (500x500) that I am trying to visually represent. It seems to me that something akin to a force directed graph is my best bet and while trying to figure out the best way to implement this, I came across more than one resource for R. The most helpful was network-visualization on I've got a rather large (but quite sparse) adja