as.Vcorpus Method to Coerce partition_bundle to VCorpus is not working.

[chdhh]

Tried to execute the provided example for the as.VCorpus method using GermaParlMini after failing on the GermaParl Corpus.

P <- partition("GERMAPARLMINI", date = "2009-11-10")
... get encoding: latin1
... get cpos and strucs
> PB <- partition_bundle(P, s_attribute = "speaker")
... getting values for s-attribute  speaker
... number of partitions to be generated:  37
> VC <- as.VCorpus(PB)
Error in UseMethod("as.VCorpus") : 
  no applicable method for 'as.VCorpus' applied to an object of class "c('partition_bundle', 'count_bundle', 'bundle')"

[PolMine]

Thanks for raising the issue. The error you report only occurrs, if the the tm-package has been loaded prior to executing the code. So if you execute the code without having loading tm, everything is fine.

This is obviously nasty. To have a solution that will always work, the new development version of polmineR includes a coerce-method that can be used by calling as(YOUROBJECT, "VCorpus"). The as.VCorpus()-method still exists, but it simply hands over the partition_bundle` to the coerce-method.

Just one note: If you use tm to generate a DocumentTermMatrix, it is really highly inefficient to reconstruct the full text using as.VCorpus first. Using the as.DocumentTermMatrix()-method, or as.TermDocumentMatrix() included in the polmineR package is the approach I recommend.

Andreas