isCompoundSymmetric.matrix

isCompoundSymmetric

Tests whether an object of class <code><a href="/link/matrix?package=asremlPlus&version=4.4.46" data-mini-rdoc="asremlPlus::matrix">matrix</a></code> is compound symmetric by checking whether all diagonal elements are equal and all off-diagonal elements are equal.

manip

Assists in automating the selection of terms to include in mixed models when
'asreml' is used to fit the models. Procedures are available for choosing models that
conform to the hierarchy or marginality principle, for fitting and choosing between
two-dimensional spatial models using correlation, natural cubic smoothing spline and
P-spline models. A history of the fitting of a sequence of models is kept in a data frame.
Also used to compute functions and contrasts of, to investigate differences between and
to plot predictions obtained using any model fitting function. The content falls into
the following natural groupings: (i) Data, (ii) Model modification functions, (iii) Model
selection and description functions, (iv) Model diagnostics and simulation functions,
(v) Prediction production and presentation functions, (vi) Response transformation
functions, (vii) Object manipulation functions, and (viii) Miscellaneous functions
(for further details see 'asremlPlus-package' in help). The 'asreml' package provides a
computationally efficient algorithm for fitting a wide range of linear mixed models using
Residual Maximum Likelihood. It is a commercial package and a license for it can be
purchased from 'VSNi' <https://vsni.co.uk/> as 'asreml-R', who will supply a zip file
for local installation/updating (see <https://asreml.kb.vsni.co.uk/>). It is not needed
for functions that are methods for 'alldiffs' and 'data.frame' objects. The package
'asremPlus' can also be installed from <http://chris.brien.name/rpackages/>.

Chris Brien

asremlPlus

Augments 'ASReml-R' in Fitting Mixed Models and Packages
Generally in Exploring Prediction Differences

isCompoundSymmetric.matrix function

<dl> <dt>object</dt>
<dd>An <code>object</code> to be tested.</dd> <dt>tol</dt>
<dd>a <code><a href="/link/numeric?package=asremlPlus&version=4.4.46" data-mini-rdoc="asremlPlus::numeric">numeric</a></code> scalar &gt; 0 specifying that values smaller than it 
 are considered to be zero.</dd> <dt>...</dt>
<dd>Provision for passing arguments to functions called internally - 
 not used at present.</dd></dl>

Arguments

Author

Tests whether an object of class <code><a href='https://rdrr.io/r/base/matrix.html'>matrix</a></code> is compound symmetric by checking whether all diagonal elements are equal and all off-diagonal elements are equal.

Tests whether an object of class matrix is compound symmetric — isCompoundSymmetric.matrix

<dl>

 <dt>object</dt>
<dd>An <code>object</code> to be tested.</dd>

 <dt>tol</dt>
<dd>a <code><a href='https://rdrr.io/r/base/numeric.html'>numeric</a></code> scalar &gt; 0 specifying that values smaller than it 
 are considered to be zero.</dd>

 <dt>...</dt>
<dd>Provision for passing arguments to functions called internally - 
 not used at present.</dd>

</dl>

isCompoundSymmetric.matrix: Tests whether an object of class matrix is compound symmetric

Description

Usage

Value

Arguments

Author

See Also