tm (version 0.3-1)

TermDocMatrix: Term-Document Matrix

Description

Constructs a term-document matrix.

Usage

TermDocMatrix(object, control = list())

Arguments

object

a text document collection

control

a list of control options. The option weighting must be a weighting function capable of handling a dgCMatrix. It defaults to weightTf for term frequency weighting. All other options are delegated internal

Value

• An S4 object of class TermDocMatrix containing a sparse term-document matrix. The following slots contain useful information:
• Data
  The sparse Matrix.
• Weighting
  The weighting mode applied to the term-document matrix.

See Also

The documentation to termFreq gives an extensive list of possible options.

Available weighting functions shipped with this package are weightTf, weightTfIdf, weightBin and weightLogical.

Examples

data("crude")
(tdm <- TermDocMatrix(crude, control = list(weighting = weightTfIdf, stopwords = TRUE)))