There is a note for igraph 1.2.1: https://cran.r-project.org/web/packages/igraph/news.html
"The GLPK library is optional, if it is not available, then the cluster_optimal() function does not work. Unfortunately we cannot bundle the GLPK library into igraph on CRAN any more, because CRAN maintainers forbid the pragmas in its source code." Gregory: I do not think this refers to Rglpk. The underlying igraph function is implemented in C (not R!), and relies on an (older) bundled version of the GLPK C library. The release notes seem to say that this can no longer be included in build hosted on CRAN. On 19 March 2018 at 08:41, Harun Pirim <[email protected]> wrote: > Dear All, > > I ran cluster_optimal() function and got the message: > > Warning in install.packages : > package ‘GLPK’ is not available (for R version 3.4.4) > > Any quick fix suggested? > > thank you, > > harun > _______________________________________________ > igraph-help mailing list > [email protected] > https://lists.nongnu.org/mailman/listinfo/igraph-help >
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