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I've encountered an issue that I'm hoping someone can help with. I constructed a phylogenetic tree using BEAST1 and then extracted the Maximum Credibility Tree using treeannotator. I'm trying to import it into R for editing, but I run into an error when using the read.beast() function from the treeio package:

MCC_tree <- read.beast("/home/MyPC/Downloads/MCC_beast.tre")
Error in FUN(X[[i]], ...) : 
  numbers of left and right parentheses in Newick string not equal

Interestingly, when I attempt to visualize the tree using figtree, it works fine. Likewise, importing into R using read.nexus() works without issues. However, I want to use read.beast() specifically because I need to annotate the "posterior", which I can't do when I import it using read.nexus().

Has anyone encountered a similar issue or have any suggestions on how to resolve this?

Thank you in advance!

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1 Answer 1

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  1. if you read it into FigTree then in the export in Nexus and perform a "save all trees" it should then read into read.beast().
  2. Use the beast file output before you performed tree annotator operation.

1 or 2. should be read directly into read.beast(). I would try option 2 first.

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