R help - Oct 2011 - Reading stopwords from a csv file

I am using the tm package to do text miniing:

I have a huge list of stopwords (2000+) that are in a csv file. I read it as
follows:

stopwordlist <- read.csv("stopwords to be Removed 10042011.csv")
myStopwords <- as.character(stopwordlist$stopwords)

When try removing the stopwords using 

tr1=tm_map(tr1,removeWords,myStopwords)

I am getting the following error:

Error in gsub(sprintf("\\b(%s)\\b", paste(words, collapse =
"|")), "",  :
  internal error in compiling regexp

However, this works fine when I define myStopwords = c(....) instead of
reading from the csv file.

Can someone please help me to resolve this issue?

Thank you.

Ravi

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The following for loops does the work but it takes a good 30 minutes to run:

for(i in 1:length(myStopwords))
{
  currentWord <- myStopwords[i]
  tr1=tm_map(tr1,removeWords,currentWord)
}

Are there any faster alternatives?? Thank you.

Ravi



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