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gtx (version 0.0.8)

moments2: Class for summary statistic matrix of second moments.

Description

Objects of this class are a matrix of second moments between a set of variables to be used in regression analyses.

Usage

is.moments2(object)

Arguments

object
an object to test.

Details

An object of class moments2 is square matrix, with an attribute “vscale” set to NULL or 1 depending on whether the moments are unweighted (for normal linear model analyses) or weighted (for GLS approximation of generalised linear model analysis).

Typically created by calling make.moments2() and used in calls to lm.moments2() and est.moments2().