predict.plsRmodel {plsRglm}

Print method for plsR models

Description

This function provides a predict method for the class "plsRmodel"

Usage

## S3 method for class 'plsRmodel'
predict(
  object,
  newdata,
  comps = object$computed_nt,
  type = c("response", "scores"),
  weights,
  methodNA = "adaptative",
  verbose = TRUE,
  ...
)

Arguments

object

An object of the class "plsRmodel".

newdata

An optional data frame in which to look for variables with which to predict. If omitted, the fitted values are used.

comps

A value with a single value of component to use for prediction.

type

Type of predicted value. Available choices are the response values ("response") or the scores ("scores").

weights

Vector of case weights. If weights is a vector of integers, then the estimated coefficients are equivalent to estimating the model from data with the individual cases replicated as many times as indicated by weights.

methodNA

Selects the way of predicting the response or the scores of the new data. For complete rows, without any missing value, there are two different ways of computing the prediction. As a consequence, for mixed datasets, with complete and incomplete rows, there are two ways of computing prediction : either predicts any row as if there were missing values in it (missingdata) or selects the prediction method accordingly to the completeness of the row (adaptative).

verbose

should info messages be displayed ?

...

Arguments to be passed on to plsRglm::plsR.

Value

When type is "response", a matrix of predicted response values is returned.
When type is "scores", a score matrix is returned.

Author(s)

Frédéric Bertrand
[e-mail]
https://fbertran.github.io/homepage/

References

Nicolas Meyer, Myriam Maumy-Bertrand et Frédéric Bertrand (2010). Comparing the linear and the logistic PLS regression with qualitative predictors: application to allelotyping data. Journal de la Societe Francaise de Statistique, 151(2), pages 1-18. http://publications-sfds.math.cnrs.fr/index.php/J-SFdS/article/view/47

Examples

data(pine)
Xpine<-pine[,1:10]
ypine<-pine[,11]
data(pine_sup)
Xpine_sup<-pine_sup[,1:10]
Xpine_supNA<-Xpine_sup
Xpine_supNA[1,1]<-NA

modpls=plsR(object=ypine,dataX=Xpine,nt=6,modele="pls", verbose=FALSE)
modplsform=plsR(x11~.,data=pine,nt=6,modele="pls", verbose=FALSE)
modpls2=plsR(object=ypine,dataX=Xpine,nt=6,modele="pls",dataPredictY=Xpine_sup, verbose=FALSE)
modpls2NA=plsR(object=ypine,dataX=Xpine,nt=6,modele="pls",dataPredictY=Xpine_supNA, verbose=FALSE)

#Identical to predict(modpls,type="response") or modpls$ValsPredictY
cbind(predict(modpls),predict(modplsform))

#Identical to modpls$ttPredictY
predict(modpls,type="scores")
predict(modplsform,type="scores")


#Identical to modpls2$ValsPredictY
cbind(predict(modpls,newdata=Xpine_sup,type="response"),
predict(modplsform,newdata=Xpine_sup,type="response"))

#Select the number of components to use to derive the prediction
predict(modpls,newdata=Xpine_sup,type="response",comps=1)    
predict(modpls,newdata=Xpine_sup,type="response",comps=3)    
predict(modpls,newdata=Xpine_sup,type="response",comps=6)    
try(predict(modpls,newdata=Xpine_sup,type="response",comps=8))

#Identical to modpls2$ttValsPredictY
predict(modpls,newdata=Xpine_sup,type="scores")    

#Select the number of components in the scores matrix
predict(modpls,newdata=Xpine_sup,type="scores",comps=1)    
predict(modpls,newdata=Xpine_sup,type="scores",comps=3)    
predict(modpls,newdata=Xpine_sup,type="scores",comps=6)    
try(predict(modpls,newdata=Xpine_sup,type="scores",comps=8))

#Identical to modpls2NA$ValsPredictY
predict(modpls,newdata=Xpine_supNA,type="response",methodNA="missingdata")    

cbind(predict(modpls,newdata=Xpine_supNA,type="response"),
predict(modplsform,newdata=Xpine_supNA,type="response"))

predict(modpls,newdata=Xpine_supNA,type="response",comps=1)    
predict(modpls,newdata=Xpine_supNA,type="response",comps=3)    
predict(modpls,newdata=Xpine_supNA,type="response",comps=6)    
try(predict(modpls,newdata=Xpine_supNA,type="response",comps=8))

#Identical to modpls2NA$ttPredictY
predict(modpls,newdata=Xpine_supNA,type="scores",methodNA="missingdata")
predict(modplsform,newdata=Xpine_supNA,type="scores",methodNA="missingdata")

predict(modpls,newdata=Xpine_supNA,type="scores")    
predict(modplsform,newdata=Xpine_supNA,type="scores")    
predict(modpls,newdata=Xpine_supNA,type="scores",comps=1)    
predict(modpls,newdata=Xpine_supNA,type="scores",comps=3)    
predict(modpls,newdata=Xpine_supNA,type="scores",comps=6)    
try(predict(modpls,newdata=Xpine_supNA,type="scores",comps=8))