This was also posted on StackOverflow. Crossposting to R-help is discouraged.
You are encouraged to read the Posting Guide and to learn how to post from
gmail using plain text.
--
David.
On Sep 3, 2013, at 10:15 AM, Siddharth Arun wrote:
> I have an Ubuntu Quantal 12.10 Server 64-bit instance. I am using openNLP
> for POS Tagging of sentences.
>
> I am using POS tagging using openNLP with „Parallel Lapply setup‰. It is
> running fine in RStudio environment. But in Ubuntu environment it is
> showing the following error.
>
>
>
> *Error in do.call(c, clusterApply(cl, x = splitList(X, length(cl)), fun =
> lapply, :*
>
> * second argument must be a list*
>
>
> Any suggestion for the problem I‚m facing?
>
>
>
> This is the code that I am using:
>
>
>
> tagPOS <- function(x, ...) {
>
> s <- as.String(x)
>
> word_token_annotator <- Maxent_Word_Token_Annotator()
>
> a2 <- Annotation(1L, "sentence", 1L, nchar(s))
>
> a2 <- annotate(s, word_token_annotator, a2)
>
> a3 <- annotate(s, PTA, a2)
>
> a3w <- a3[a3$type == "word"]
>
> POStags <- unlist(lapply(a3w$features, `[[`, "POS"))
>
> POStagged <- paste(sprintf("%s/%s", s[a3w], POStags), collapse = " ")
>
> list(POStagged = POStagged, POStags = POStags)
>
> }
>
>
>
> cl <- makeCluster(mc <- getOption("cl.cores", detectCores()/2))
>
> clusterEvalQ(cl, {
>
> library(openNLP)
>
> library(NLP)
>
> PTA <- Maxent_POS_Tag_Annotator()
>
> })
>
>
>
> This is the setup I am using:
>
> · Created an cloud instance with "Ubuntu Quantal 12.10 Server 64-bit
> instance"
>
>
>
> · Installed LAMP server in the instance
>
>
>
> · After which I installed R. By default R version was 2.15.0
>
>
>
> · Upgraded the R version to R 3.0.1
>
> --
> Regards,
>
> Siddharth Arun,
> Contact No. - +91 8880065278
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
David Winsemius
Alameda, CA, USA
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
