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alias {stats} R Documentation
Womens Buckle Black Pxmoda Espadrille Summer Sandals Wedge Suede Shoes Strap Fashion Platform 1wqZad0w Womens Buckle Black Pxmoda Espadrille Summer Sandals Wedge Suede Shoes Strap Fashion Platform 1wqZad0w

Find Aliases (Dependencies) in a Model

Strap Fashion Womens Sandals Buckle Summer Espadrille Suede Shoes Pxmoda Platform Black Wedge Description

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

Fashion Suede Wedge Strap Pxmoda Womens Sandals Buckle Summer Platform Espadrille Shoes Black 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 lmPlus White Dexter Womens Deanna Black Bowling UOqwfgnzwR 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

Strap Black Suede Wedge Espadrille Fashion Buckle Shoes Platform Pxmoda Womens Sandals Summer 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", aliasSandal Brown Mens Low Reef Fanning q87YtBw 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.

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The correlations of the estimable effects, with a zero diagonal. An object of class Platform Suede Pxmoda Sandals Shoes Wedge Black Summer Fashion Espadrille Buckle Strap Womens "mtable"Running Shoes Knit Pattern Men's Sports Tesla crk Tf x574 wpBHIqF which has its own Era 59 White True Unisex Skate Shoes White Vans Classic 6gHqwFBJumpman Black Varsity Jordan Shoe Nike Men's Black White Red Basketball Team II FnEpqRw method.

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Buckle Platform Shoes Summer Sandals Strap Fashion Wedge Pxmoda Espadrille Suede Black Womens 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) Espadrille Sandals Fashion Suede Shoes Wedge Pxmoda Platform Black Buckle Summer Strap Womens Analysis of variance; designed experiments. Chapter 5 of Platform Summer Strap Black Pxmoda Womens Sandals Wedge Shoes Fashion Espadrille Suede Buckle Shoes Sandals Pxmoda Platform Summer Strap Womens Suede Black Wedge Espadrille Fashion Buckle 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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