I have a problem with the textmatrix() function of the LSA package whenever I
specify 'removeNumbers=TRUE'. The data for the function are stored in a
directory LSAwork which consists of a series of files that houses the text in
column form. As long as removeNumbers = FALSE or it is not present the
textmatrix function works just fine. The error message I get seems to suggest
it is finding the files empty after filtering. However, all of the files are
primarily words with only a few numbers mixed in. Any help appreciated.
The data I am using is the MEDLINE data set and the first file in the data set
med.000001 looks like this:
correlation
between
maternal
and
fetal
plasma
levels
of
glucose
and
free
fatty
acids
.
correlation
coefficients
have
been
determined
between
the
the command I am using looks like this, with the resulting error below:
>
> dtm <- textmatrix(LSAwork, stemming=TRUE, stopwords=StopListm, minGlobFreq=1,
> minWordLength=2, removeNumbers=TRUE)
Error in data.frame(docs = basename(file), terms = names(tab), Freq = tab, :
arguments imply differing number of rows: 1, 0
In addition: Warning message:
In FUN(c("LSAWork/med.000001", "LSAWork/med.000002", "LSAWork/med.000003", :
[textvector] - the file LSAWork/med.000001 contains no terms after filtering.
>
Triss Ashton
University of North Texas
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