factors_combine

Intern function, used for creation of a matrix with all factor
combinations of the cutpoint-variable

internal

Estimate one or two cutpoints of a metric or ordinal-scaled
variable in the multivariable context of survival data or
time-to-event data. Visualise the cutpoint estimation process using contour
plots, index plots, and spline plots. It is also possible to estimate
cutpoints based on the assumption of a U-shaped or inverted U-shaped
relationship between the predictor and the hazard ratio.
Govindarajulu, U., and Tarpey, T. (2022) <doi:10.1080/02664763.2020.1846690>.

Jan Porthun

cutpoint

Estimate Cutpoints of Metric Variables in the Context of Cox
Regression

factors_combine function

<dl><dt>bandwith</dt>
<dd>numeric, determines the minimum size per group of the
dichitomised variable</dd>
<dt>nb_of_cp</dt>
<dd>numeric, number of cutpoints searching for</dd>
<dt>nrm</dt>
<dd>numeric, number of rows in cpdata after removing observations
with missing values in biomarker</dd>
<dt>symtails</dt>
<dd>logical, if TRUE the tails of the dichotomised variable
are symmetrical</dd></dl>

Arguments

Combine Factors — factors_combine

<dl>

<dt>bandwith</dt>
<dd>numeric, determines the minimum size per group of the
dichitomised variable</dd>


<dt>nb_of_cp</dt>
<dd>numeric, number of cutpoints searching for</dd>


<dt>nrm</dt>
<dd>numeric, number of rows in cpdata after removing observations
with missing values in biomarker</dd>


<dt>symtails</dt>
<dd>logical, if TRUE the tails of the dichotomised variable
are symmetrical</dd>

</dl>

factors_combine: Combine Factors

Description

Usage

Value

Arguments