plotMultinomial function

Plot category probabilities of multinomial model

Plots category probabilities functions estimated by multinom() from the nnet package using the ggplot2

package.

plotMultinomial(x, matching, matching.name = "matching")

Arguments

• x: object of class multinom
• matching: numeric: vector of matching criterion used for estimation in x.
• matching.name: character: name of matching criterion used for estimation in x.

Returns

An object of class ggplot and/or gg.

Examples

# loading data
data(GMAT, GMATtest, GMATkey, package = "difNLR")

matching <- scale(rowSums(GMAT[, 1:20])) # Z-score

# multinomial model for item 1
fit <- nnet::multinom(relevel(GMATtest[, 1], ref = paste(GMATkey[1])) ~ matching)

# plotting category probabilities
plotMultinomial(fit, matching, matching.name = "Z-score")

See Also

nnet::multinom()

Author(s)

Adela Hladka

Institute of Computer Science of the Czech Academy of Sciences

hladka@cs.cas.cz

Tomas Jurica

Institute of Computer Science of the Czech Academy of Sciences

Patricia Martinkova

Institute of Computer Science of the Czech Academy of Sciences

martinkova@cs.cas.cz