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alias {stats} R Documentation
Men's Gym White Basketball Ii NIKE Versitile Shoe Red Black Air PxfW80qd Men's Gym White Basketball Ii NIKE Versitile Shoe Red Black Air PxfW80qd Men's Gym White Basketball Ii NIKE Versitile Shoe Red Black Air PxfW80qd Men's Gym White Basketball Ii NIKE Versitile Shoe Red Black Air PxfW80qd

Find Aliases (Dependencies) in a Model

Men's Basketball Air Gym Ii Shoe Red White Versitile NIKE Black Description

Find aliases (linearly dependent terms) in a linear model specified by a formula.

Air Gym White Ii Black NIKE Red Basketball Men's Versitile Shoe Usage

alias(object, ...)

## S3 method for class 'formula'
alias(object, data, ...)

## S3 method for class 'lm'
alias(object, complete = TRUE, partial = FALSE,
      partial.pattern = FALSE, ...)

Arguments

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object

A fitted model object, for example from lmYouth Kids Hickory Slipper BEARPAW Moc Toddler zwq5naAtpn or aov, or a formula for alias.formula.

data

Optionally, a data frame to search for the objects in the formula.

complete

Should information on complete aliasing be included?

partial

Should information on partial aliasing be included?

partial.pattern

Versitile NIKE White Shoe Air Basketball Red Men's Ii Gym Black Should partial aliasing be presented in a schematic way? If this is done, the results are presented in a more compact way, usually giving the deciles of the coefficients.

...

further arguments passed to or from other methods.

Details

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Although the main method is for class "lm", aliasBoot Brown Dr Winsted Chukka Martens Men's Dark qzzISY is most useful for experimental designs and so is used with fits from aov. Complete aliasing refers to effects in linear models that cannot be estimated independently of the terms which occur earlier in the model and so have their coefficients omitted from the fit. Partial aliasing refers to effects that can be estimated less precisely because of correlations induced by the design.

Some parts of the "lm" method require recommended package Running Max Black Shoes wolf Mens Essential NIKE Grey Air White Zero qSaxPA to be installed.

Value

A list (of Cady Brizo Navy Clarks Flat Women's Sandal qwEZZBC "OFFICIALLY and Wildcats Mens Feet NCAA Happy Comfy LICENSED Womens College Kentucky Flop qq8P0Ut") containing components

Model

Description of the model; usually the formula.

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A matrix with columns corresponding to effects that are linearly dependent on the rows.

Shoe Gym Versitile Black NIKE Air Red Men's Ii Basketball White Partial

The correlations of the estimable effects, with a zero diagonal. An object of class Gym Shoe White Ii Versitile NIKE Red Black Basketball Men's Air "mtable"Chander Moonless Retro Men's ECCO Sneaker a5P84wxq which has its own Era 59 White True Unisex Skate Shoes White Vans Classic 6gHqwFBBarefoot Shoes Boating CIOR Shoes Quick Dry Aqua Blue Swim Men Light Water Shoes Women Beach Yoga Driving Walking YYPr5Sq method.

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Red Air Gym Men's Black Basketball Versitile NIKE Shoe White Ii Note

The aliasing pattern may depend on the contrasts in use: Helmert contrasts are probably most useful.

The defaults are different from those in S.

Author(s)

The design was inspired by the S function of the same name described in Chambers et al (1992).

References

Chambers, J. M., Freeny, A and Heiberger, R. M. (1992) Ii Men's NIKE White Shoe Versitile Gym Red Black Basketball Air Analysis of variance; designed experiments. Chapter 5 of Men's Versitile Red NIKE Basketball Shoe Ii White Black Air Gym Versitile NIKE Gym Basketball Air Ii Shoe White Red Men's Black Statistical Models in S eds J. M. Chambers and T. J. Hastie, Wadsworth & Brooks/Cole.

Examples

op <- options(contrasts = c("contr.helmert", "contr.poly"))
npk.aov <- aov(yield ~ block + N*P*K, npk)
alias(npk.aov)
options(op)  # reset

[Package stats version 3.6.0 Slippers Home Anti Memory Grey FootTech Skid Designed Comfort Foam Women Shoes House Cotton Lightweight YSvnSWaEwq]
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