quanteda (version 1.3.4)

predict.textmodel_nb: Prediction from a fitted textmodel_nb object

Description

predict.textmodel_nb() implements class predictions from a fitted Naive Bayes model. using trained Naive Bayes examples

Usage

# S3 method for textmodel_nb
predict(object, newdata = NULL, type = c("class",
  "probability", "logposterior"), force = FALSE, ...)

Arguments

object

a fitted Naive Bayes textmodel

newdata

dfm on which prediction should be made

type

the type of predicted values to be returned; see Value

force

make newdata's feature set conformant to the model terms

...

not used

Value

predict.textmodel_nb returns either a vector of class predictions for each row of newdata (when type = "class"), or a document-by-class matrix of class probabilities (when type = "probability") or log posterior likelihoods (when type = "logposterior").

See Also

textmodel_nb

Examples

# NOT RUN {
# application to LBG (2003) example data
(nb <- textmodel_nb(data_dfm_lbgexample, c("A", "A", "B", "C", "C", NA)))
predict(nb)
predict(nb, type = "logposterior")
# }