make.appearance.matrix: Make phrase appearance matrix from textreg result.
Description
Make matrix of which phrases appear in which of the positively
marked documents.
Usage
make.appearance.matrix(result)
Arguments
result
An textreg.result object.
Value
A $n X p$ matrix for $n$ documents and $p$ phrases in the result object. Each entry is a 0/1 value
indicating presence of the given phrase in the given document.
Details
Very similar to phrase.matrix, except this looks only at positively
marked documents and just returns 1 or 0 on whether any document has
a phrase, rather than giving counts.
This is used by the clustering vizualizations and make.similarity.matrix.