ltmatrices

diagonals

Storge of and computations on multiple lower triangular matrices

matrix

Formula-based user-interfaces to specific transformation models
implemented in package 'mlt'. Available models include Cox models, some parametric
survival models (Weibull, etc.), models for ordered categorical variables,
normal and non-normal (Box-Cox type) linear models, and continuous outcome logistic regression
(Lohse et al., 2017, <DOI:10.12688/f1000research.12934.1>). The underlying theory
is described in Hothorn et al. (2018) <DOI:10.1111/sjos.12291>. An extension to
transformation models for clustered data is provided (Barbanti and Hothorn, 2022,
<DOI:10.1093/biostatistics/kxac048>). Multivariate conditional transformation models
(Klein et al, 2022, <DOI:10.1111/sjos.12501>) and shift-scale transformation models (Siegfried et al, 2023,
<DOI:10.1080/00031305.2023.2203177>) can be fitted as well.

Torsten Hothorn

tram

Transformation Models

Luisa Barbanti

Sandra Siegfried

Brian Ripley

Bill Venables

Nadja Klein

ltmatrices function

<dl> <dt>x</dt>
<dd>a numeric matrix, each row is interpreted as the elements of a
lower triangular matrix in row order (<code>byrow</code> being <code>TRUE</code>) or
column order (otherwise). The matrices may contain non-unit diagonals (when
<code>diag</code> is <code>TRUE</code>).</dd> <dt>diag</dt>
<dd>logical; <code>x</code> contains non-unit diagonals if <code>TRUE</code>.</dd> <dt>byrow</dt>
<dd>logical; <code>x</code> is in row order if <code>TRUE</code>.</dd> <dt>names</dt>
<dd>an optional vector of names, autogenerated if <code>TRUE</code>.</dd> <dt>...</dt>
<dd>additional arguments.</dd></dl>

Arguments

Lower Triangular Matrices — ltmatrices

<dl>

 <dt>x</dt>
<dd>a numeric matrix, each row is interpreted as the elements of a
lower triangular matrix in row order (<code>byrow</code> being <code>TRUE</code>) or
column order (otherwise). The matrices may contain non-unit diagonals (when
<code>diag</code> is <code>TRUE</code>).</dd>

 <dt>diag</dt>
<dd>logical; <code>x</code> contains non-unit diagonals if <code>TRUE</code>.</dd>

 <dt>byrow</dt>
<dd>logical; <code>x</code> is in row order if <code>TRUE</code>.</dd>

 <dt>names</dt>
<dd>an optional vector of names, autogenerated if <code>TRUE</code>.</dd>

 <dt>...</dt>
<dd>additional arguments.</dd>

</dl>

ltmatrices: Lower Triangular Matrices

Description

Usage

Value

Arguments

Details

Examples