load_if_installed

This function is taken from the Rprofile.site file of Microsoft R Open.
It was added to the package namespace to avoid a NOTE during the R CMD check
process stating that this function is not gobally defined.

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

load_if_installed function

<dl><dt>package</dt>
<dd>(character) package name to load, usually this will be package
'RevoUtilsMath' if available</dd></dl>

Arguments

Authors of the Rprofile.site file in Microsoft R Open.

Author

Load 'RevoUtilsMath'-package if available — load_if_installed

<dl>

<dt>package</dt>
<dd>(character) package name to load, usually this will be package
'RevoUtilsMath' if available</dd>

</dl>

load_if_installed: Load 'RevoUtilsMath'-package if available

Description

Usage

Arguments

Author

Details