Ch06 Text Regularization

[mzagaja]

In chapter 6 I am at the part where I am supposed to be executing

dtm <- DocumentTermMatrix(corpus)

However it fails out with the following error:

Error in UseMethod("meta", x) : 
  no applicable method for 'meta' applied to an object of class "try-error"
In addition: Warning message:
In mclapply(unname(content(x)), termFreq, control) :
  all scheduled cores encountered errors in user code

StackOverflow suggested installing SnowballC and also trying
corpus <- tm_map(corpus, content_transformer(tolower), lazy = TRUE)

Neither of these solutions worked and I am thus flummoxed.

Here is my session info:

R version 3.1.2 (2014-10-31)
Platform: x86_64-apple-darwin13.4.0 (64-bit)

locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] glmnet_1.9-8  Matrix_1.1-4  mgcv_1.8-4    nlme_3.1-118  plyr_1.8.1    ggplot2_1.0.0 tm_0.6             NLP_0.1-5    

loaded via a namespace (and not attached):
 [1] colorspace_1.2-4 digest_0.6.8     grid_3.1.2       gtable_0.1.2     labeling_0.3     lattice_0.20-29      MASS_7.3-35      munsell_0.4.2    parallel_3.1.2   proto_0.3-10    
[11] Rcpp_0.11.3      reshape2_1.4.1   scales_0.2.4     slam_0.1-32      stringr_0.6.2    tools_3.1.2