mixOmics (version 5.2.0)

summary: Summary Methods for CCA and PLS objects

Description

Produce summary methods for class "rcc", "pls" and "spls".

Usage

## S3 method for class 'rcc':
summary(object, what = c("all", "communalities", "redundancy"), 
        cutoff = NULL, digits = 4, ...)
		
## S3 method for class 'pls':
summary(object, what = c("all", "communalities", "redundancy", 
        "VIP"), digits = 4, keep.var = FALSE, ...)
## S3 method for class 'spls':
summary(object, what = c("all", "communalities", "redundancy",
        "VIP"), digits = 4, keep.var = FALSE, ...)

Arguments

object

object of class inheriting from "rcc", "pls" or "spls".

cutoff

real between 0 and 1. Variables with all correlations components below this cutoff in absolute value are not showed (see Details).

digits

integer, the number of significant digits to use when printing. Defaults to 4.

what

character string or vector. Should be a subset of c("all", "summarised", "communalities", "redundancy", "VIP"). "VIP" is only available for (s)PLS. See Details.

keep.var

boolean. If TRUE only the variables with loadings not zero (as selected by spls) are showed. Defaults to FALSE.

...

not used currently.

Value

• The function summary returns a list with components:
• ncomp
  the number of components in the model.
• cor
  the canonical correlations.
• cutoff
  the cutoff used.
• keep.var
  list containing the name of the variables selected.
• mode
  the algoritm used in pls or spls.
• Cm
  list containing the communalities.
• Rd
  list containing the redundancy.
• VIP
  matrix of VIP coefficients.
• what
  subset of c("all", "communalities", "redundancy", "VIP").
• digits
  the number of significant digits to use when printing.
• method
  method used: rcc, pls or spls.

encoding

latin1

Details

The information in the rcc, pls or spls object is summarised, it includes: the dimensions of X and Y data, the number of variates considered, the canonical correlations (if object of class "rcc") and the (s)PLS algorithm used (if object of class "pls" or "spls") and the number of variables selected on each of the sPLS components (if x of class "spls").

"communalities" in what gives Communalities Analysis. "redundancy" display Redundancy Analysis. "VIP" gives the Variable Importance in the Projection (VIP) coefficients fit by pls or spls. If what is "all", all are given.

For class "rcc", when a value to cutoff is specified, the correlations between each variable and the equiangular vector between $X$- and $Y$-variates are computed. Variables with at least one correlation componente bigger than cutoff are showed. The defaults is cutoff=NULL all the variables are given.

See Also

rcc, pls, spls, vip.

Examples

## summary for objects of class 'rcc'
data(nutrimouse)
X <- nutrimouse$lipid
Y <- nutrimouse$gene
nutri.res <- rcc(X, Y, ncomp = 3, lambda1 = 0.064, lambda2 = 0.008)
more <- summary(nutri.res, cutoff = 0.65)

## summary for objects of class 'pls'
data(linnerud)
X <- linnerud$exercise
Y <- linnerud$physiological
linn.pls <- pls(X, Y)
more <- summary(linn.pls)

## summary for objects of class 'spls'
data(liver.toxicity)
X <- liver.toxicity$gene
Y <- liver.toxicity$clinic
toxicity.spls <- spls(X, Y, ncomp = 3, keepX = c(50, 50, 50), 
                      keepY = c(10, 10, 10))
more <- summary(toxicity.spls, what = "redundancy", keep.var = TRUE)