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With the latest major release of igraph for R (igraph 1.0.0), the function to calculate the Kamada Kawai layout was re-written from scratch. The new function (layout_with_kk) seems to produce very different results than the previous function (layout.kamada.kawai) on the same networks (around 4k nodes, 18k edges). Maybe it's a change in the default argument values, or maybe something else.

I'd like to access the old function to figure out what is happening.

Raffaele Vacca
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    Get the old package version from the [CRAN archive](https://cran.r-project.org/src/contrib/Archive/igraph/). Don't install it, just unzip it and get the relevant file. – Rich Scriven Oct 13 '15 at 23:46
  • The old `layout.kamada.kawai` was written in C (and so is the new one) so it's probably not enough to extract the relevant file from the old package - one will also need the corresponding C source files. – Tamás Oct 14 '15 at 09:04

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