Morpho: covW – R documentation

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covW

calculate the pooled within groups covariance matrix

calculate the pooled within groups covariance matrix

covW(data, groups, robust = c("classical", "mve", "mcd"), ...)

`data`	a matrix containing data
`groups`	grouping variables
`robust`	character: determines covariance estimation methods in case `sep=TRUE`, when covariance matrices and group means can be estimated robustly using `MASS::cov.rob`. Default is the standard product-moment covariance matrix.
`...`	additional parameters passed to `MASS::cov.rob` for robust covariance and mean estimations.

Returns the pooled within group covariance matrix. The attributes contain the entry means, containing the respective group means.

Stefan Schlager

data(iris)
poolCov <- covW(iris[,1:4],iris[,5])

Calculations and Visualisations Related to Geometric Morphometrics

v2.8

GPL-2

Authors

Stefan Schlager [aut, cre, cph], Gregory Jefferis [ctb], Dryden Ian [cph]

Initial release

2020-02-26