> I find that when I run the identical network through igraph I get different > plots of the network. I'm wondering if (1) if I am mistaken, i.e. the > network isn't identical or (2) this is normal. This is normal. Most layout algorithms start from a random "seed" layout and then optimize it one way or another. If you want to preserve a layout that you like, you can save the result of the layout algorithm and simply re-use it later in the "layout" argument of the plot() call instead of specifying the name of a layout algorithm.
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