lda_from_pls {plsVarSel}

LDA/QDA classification from PLS model

Description

For each number of components LDA/QDA models are created from the scores of the supplied PLS model and classifications are performed.

Usage

lda_from_pls(model, grouping, newdata, ncomp)

Arguments

model

pls model fitted with the pls package

grouping

vector of grouping labels

newdata

predictors in the same format as in the pls model

ncomp

maximum number of PLS components

Value

matrix of classifications

See Also

VIP (SR/sMC/LW/RC), filterPLSR, shaving, stpls, truncation, bve_pls, ga_pls, ipw_pls, mcuve_pls, rep_pls, spa_pls, lda_from_pls, lda_from_pls_cv, setDA.

Examples

data(mayonnaise, package = "pls")
mayonnaise <- within(mayonnaise, {dummy <- model.matrix(~y-1,data.frame(y=factor(oil.type)))})
pls <- plsr(dummy ~ NIR, ncomp = 10, data = mayonnaise, subset = train)
with(mayonnaise, {
 classes <- lda_from_pls(pls, oil.type[train], NIR[!train,], 10)
 colSums(oil.type[!train] == classes) # Number of correctly classified out of 42
})