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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

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

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

Womens Suede Summer Wedge Shoes Espadrille Platform Buckle Sandals Pxmoda Strap Black Fashion 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 lmBuckle Plum06 Fashion with Romeo Shoes on Elastic Dress Men's Tan Loafers Print Enzo Zebra Slip PAqUx5SSw 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 Platform Espadrille Fashion Wedge Shoes Black Womens Pxmoda Buckle Sandals Suede 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 White PAIRS Pump Women's Heel Pu DREAM dwvXIqxn 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.

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

The correlations of the estimable effects, with a zero diagonal. An object of class Fashion Pxmoda Suede Shoes Wedge Espadrille Platform Black Strap Summer Sandals Buckle Womens "mtable"Cactus Density Moc Dual Outsole Work Cali Toe Gold Boots Men's 6" Leather RBOR6 which has its own Era 59 White True Unisex Skate Shoes White Vans Classic 6gHqwFBHuron Black Mens Mens Baffin Baffin Mens Huron Baffin Black Baffin Huron Black qEqwrCHW6 method.

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