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[igraph] Creating graphs: Error in seq_len(no) : argument must be coerci

From: David Robinson
Subject: [igraph] Creating graphs: Error in seq_len(no) : argument must be coercible to non-negative integer
Date: Thu, 16 Jul 2015 21:13:36 +0000



Subsequent to updating to the latest version of igraph I get the error message:


“Error in seq_len(no) : argument must be coercible to non-negative integer”


when creating an igraph object with certain attribute characteristics (ie many attributes) the error is generated. I have tried to pin down the cause and have failed to do so but does seem to be associated with the number of edge or vertex attributes (80+). Interestingly, changing the method of creating attributes from add.vertices to assigning values directly to the graph (eg V(g)$numeric <- c(1,2,3,4)) alleviates this problem some of the time, but not all the time.


I attempted to create some code to reproduce in toy example but have failed. In short the code worked in previous version and now does not so I am assuming it is a bug. Here is session info.




R version 3.2.1 (2015-06-18)

Platform: x86_64-w64-mingw32/x64 (64-bit)

Running under: Windows 7 x64 (build 7601) Service Pack 1



[1] LC_COLLATE=English_New Zealand.1252  LC_CTYPE=English_New Zealand.1252    LC_MONETARY=English_New Zealand.1252

[4] LC_NUMERIC=C                         LC_TIME=English_New Zealand.1252   


attached base packages:

[1] stats     graphics  grDevices utils     datasets  methods   base    


other attached packages:

[1] fastcluster_1.1.16         plyr_1.8.3      stringr_0.6.2 igraph_1.0.1


loaded via a namespace (and not attached):

[1] magrittr_1.5       tools_3.2.1     Rcpp_0.11.6   stringi_0.5-5    

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