Re: [R] Error in Parts of Speach Tagging using openNLP

[Siddharth Arun]

I posted on both the forums because i needed urgent help on the issue. And
I am still waiting for a relevant reply on how to solve the issue. If you
have any suggestions please do share.


On Wed, Sep 4, 2013 at 6:08 AM, David Winsemius <dwinsem...@comcast.net>wrote:

> 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
>
>


-- 
Regards,

Siddharth Arun,
Contact No. - +91 8880065278

        [[alternative HTML version deleted]]


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