R: Read in a .ldac Formatted File

readLdac {stm} | R Documentation

## Read in a .ldac Formatted File

### Description

Read in a term document matrix in the .ldac sparse matrix format popularized by David Blei's C code implementation of lda.

### Usage

    readLdac(filename)

### Arguments

`filename` | An input file or filepath to be processed

### Details

`ldac` expects a file name or path that contains a file in Blei's LDA-C format. From his ReadMe: "The data is a file where each line is of the form:

[M] [term_1]:[count] [term_2]:[count] ... [term_N]:[count]

where [M] is the number of unique terms in the document, and the [count] associated with each term is how many times that term appeared in the document. Note that [term_1] is an integer which indexes the term; it is not a string."

Because R indexes from one, the values of the term indices are incremented by one on import.

### Value

`documents` | A documents object in our format

### See Also

`textProcessor`, `prepDocuments` `readCorpus`

[Package stm version 1.3.6 Index]