compositions: varmlm – R documentation

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varmlm

Residual variance of a model

Computes the unbiased estimate for the variance of the residuals of a model.

## S3 method for class 'mlm'
var(x,...) 
## S3 method for class 'lm'
var(x,...)

`x`	a linear model object
`...`	Unused, for generic purposes only.

The difference of this command to var(resid(X)) is that this command correctly adjusts for the degrees of freedom of the model.

`var.lm`	returns a scalar giving the estimated variance of the residuals
`var.mlm`	returns a the estimated variance covariance matrix of the residuals

K.Gerald v.d. Boogaart http://www.stat.boogaart.de, Raimon Tolosana-Delgado

data(Orange)
var(lm(circumference~age,data=Orange))
var(lm(cbind(circumference,age)~age,data=Orange))

Compositional Data Analysis

v2.0-1

GPL (>= 2)

Authors

K. Gerald van den Boogaart <boogaart@hzdr.de>, Raimon Tolosana-Delgado, Matevz Bren

Initial release

2021-01-08