scores {pls}

Extract Scores and Loadings from PLSR and PCR Models

Description

These functions extract score and loading matrices from fitted mvr models.

Usage

loadings(object, ...)

## Default S3 method:
loadings(object, ...)

scores(object, ...)

## Default S3 method:
scores(object, ...)

Yscores(object)

loading.weights(object)

Yloadings(object)

Arguments

object

a fitted model to extract from.

...

extra arguments, currently not used.

Details

All functions extract the indicated matrix from the fitted model, and will work with any object having a suitably named component.

The default scores and loadings methods also handle prcomp objects (their scores and loadings components are called x and rotation, resp.), and add an attribute "explvar" with the variance explained by each component, if this is available. (See explvar for details.)

Value

A matrix with scores or loadings.

Note

There is a loadings function in package stats. It simply returns any element named "loadings". See loadings for details. The function can be accessed as stats::loadings(...).

Author(s)

Ron Wehrens and Bjørn-Helge Mevik

See Also

mvr, coef.mvr

Examples

data(yarn)
plsmod <- plsr(density ~ NIR, 6, data = yarn)
scores(plsmod)
loadings(plsmod)[,1:4]