textmatrix
(Package: lsa) :
Textmatrix (Matrices)
Creates a document-term matrix from all textfiles in a given directory.
● Data Source:
CranContrib
● Keywords: array
● Alias: textmatrix, textvector
●
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summary.textmatrix
(Package: lsa) :
Summary of a textmatrix (Matrices)
Return a summary with some statistical infos about a given textmatrix.
● Data Source:
CranContrib
● Keywords: array
● Alias: summary.textmatrix
●
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associate
(Package: lsa) :
Find close terms in a textmatrix
Returns those terms above a threshold close to the input term, sorted in descending order of their closeness. Alternatively, all terms and their closeness value can be returned sorted descending.
● Data Source:
CranContrib
● Keywords: algebra
● Alias: associate
●
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cosine
(Package: lsa) :
Cosine Measure (Matrices)
Calculates the cosine measure between two vectors or between all column vectors of a matrix.
● Data Source:
CranContrib
● Keywords: multivariate, univar
● Alias: cosine
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print.textmatrix
(Package: lsa) :
Print a textmatrix (Matrices)
Display a one screen short version of a textmatrix.
● Data Source:
CranContrib
● Keywords: array
● Alias: print.textmatrix
●
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triples
(Package: lsa) :
Bind Triples to a Textmatrix
Allows to store, manage and retrieve SPO-triples (subject, predicate, object) bound to the document columns of a document term matrix.
● Data Source:
CranContrib
● Keywords: array
● Alias: delTriple, getSubjectId, getTriple, setTriple
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weightings
(Package: lsa) :
Weighting Schemes (Matrices)
Calculates a weighted document-term matrix according to the chosen local and/or global weighting scheme.
● Data Source:
CranContrib
● Keywords: array
● Alias: entropy, gw_entropy, gw_gfidf, gw_idf, gw_normalisation, lw_bintf, lw_logtf, lw_tf
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sample.textmatrix
(Package: lsa) :
Create a random sample of files
Creates a subset of the documents of a corpus to help reduce a corpus in size through random sampling.
● Data Source:
CranContrib
● Keywords: algebra
● Alias: sample.textmatrix
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lsa
(Package: lsa) :
Create a vector space with Latent Semantic Analysis (LSA)
Calculates a latent semantic space from a given document-term matrix.
● Data Source:
CranContrib
● Keywords: algebra
● Alias: lsa
●
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as.textmatrix
(Package: lsa) :
Display a latent semantic space generated by Latent Semantic Analysis (LSA)
Returns a latent semantic space (created by createLSAspace) in textmatrix format: rows are terms, columns are documents.
● Data Source:
CranContrib
● Keywords: algebra
● Alias: as.textmatrix
●
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