check.formula_terms

The function controls that the terms composing the formula object provided in input to the main model are correct.
They must include:<ul>
<li>response variable on the left hand side</li>
<li>covariates (numerical or categorical) on the right hand side</li>
<li>cluster variable (categorical) on the right hand side and specified by the function 'cluster()'</li>
</ul>Moreover, it controls that the covariates are contained in the dataset provided.

internal

Fits time-dependent shared frailty Cox model (specifically the adapted Paik et al.'s Model) based on the paper "Centre-Effect on Survival After Bone Marrow Transplantation: Application of Time-Dependent Frailty Models", by C.M. Wintrebert, H. Putter, A.H. Zwinderman and J.C. van Houwelingen (2004) <doi:10.1002/bimj.200310051>.

Alessandra Ragni

TimeDepFrail

Time Dependent Shared Frailty Cox Model

Giulia Romani

Chiara Masci

check.formula_terms function

<dl><dt>formula</dt>
<dd>Formula object specifying the relationship between the time-to-event, the covariates and the cluster variables.</dd>
<dt>data</dt>
<dd>Dataset in which these variables can be found.</dd></dl>

Arguments

The function controls that the terms composing the formula object provided in input to the main model are correct.
They must include:<ul>
<li>response variable on the left hand side</li>
<li>covariates (numerical or categorical) on the right hand side</li>
<li>cluster variable (categorical) on the right hand side and specified by the function 'cluster()'</li>
</ul>

Moreover, it controls that the covariates are contained in the dataset provided.

Check Correctness of Formula Terms — check.formula_terms

<dl>

<dt>formula</dt>
<dd>Formula object specifying the relationship between the time-to-event, the covariates and the cluster variables.</dd>


<dt>data</dt>
<dd>Dataset in which these variables can be found.</dd>

</dl>

check.formula_terms: Check Correctness of Formula Terms

Description

Usage

Value

Arguments