chol2invData

This dataset was added because it generates an error in function 'chol2inv' when
	trying to invert the variance-covariance matrix 'V' of the mixed model 'value~ID+(Site)'.
	This dataset and the associated mixed model are part of the unit-test collection of the
	package.

datasets


ANOVA and REML estimation of linear mixed models is implemented, once following
Searle et al. (1991, ANOVA for unbalanced data), once making use of the 'lme4' package.
The primary objective of this package is to perform a variance component analysis (VCA)
according to CLSI EP05-A3 guideline "Evaluation of Precision of Quantitative Measurement
Procedures" (2014). There are plotting methods for visualization of an experimental design,
plotting random effects and residuals. For ANOVA type estimation two methods for computing
ANOVA mean squares are implemented (SWEEP and quadratic forms). The covariance matrix of
variance components can be derived, which is used in estimating confidence intervals. Linear
hypotheses of fixed effects and LS means can be computed. LS means can be computed at specific
values of covariables and with custom weighting schemes for factor variables. See ?VCA for a
more comprehensive description of the features.

Andre Schuetzenmeister

Variance Component Analysis

chol2invData function

A data frame with 158 observations on the following 3 variables.<ul>
<li>value
	The response variable.</li>
<li>ID
	Variable with 6 levels corresponding to samples.</li>
<li>Site
	Variable with 3 levels corresponding to sites/devices.</li>
</ul>

chol2invData: Dataset Generating Error in Function 'chol2inv'

Description

Usage

Arguments

Format