survsrf_tune_single

Internal function for survsrf_tune(), performs 1 CV

Performs repeated nested cross-validation for Cox Proportionate Hazards, Cox Lasso, Survival Random Forest, and their ensemble. Returns internally validated concordance index, time-dependent area under the curve, Brier score, calibration slope, and statistical testing of non-linear ensemble outperforming the baseline Cox model. In this, it helps researchers to quantify the gain of using a more complex survival model, or justify its redundancy. Equally, it shows the performance value of the non-linear and interaction terms, and may highlight the need of further feature transformation. Further details can be found in Shamsutdinova, Stamate, Roberts, & Stahl (2022) "Combining Cox Model and Tree-Based Algorithms to Boost Performance and Preserve Interpretability for Health Outcomes" <doi:10.1007/978-3-031-08337-2_15>, where the method is described as Ensemble 1.

Diana Shamsutdinova

survcompare

Nested Cross-Validation to Compare Cox-PH, Cox-Lasso, Survival
Random Forests

Daniel Stahl

survsrf_tune_single function

<dl><dt>df_tune</dt>
<dd>data</dd>
<dt>predict.factors</dt>
<dd>list of predictor names</dd>
<dt>fixed_time</dt>
<dd>predictions for which time are computed for c-index</dd>
<dt>grid_hyperparams</dt>
<dd>hyperparameters grid (or a default will be used )</dd>
<dt>inner_cv</dt>
<dd>number of folds for each CV</dd>
<dt>randomseed</dt>
<dd>randomseed</dd>
<dt>progressbar</dt>
<dd>FALSE(default)/TRUE</dd></dl>

Arguments

Internal function for survsrf_tune(), performs 1 CV — survsrf_tune_single

<dl>

<dt>df_tune</dt>
<dd>data</dd>


<dt>predict.factors</dt>
<dd>list of predictor names</dd>


<dt>fixed_time</dt>
<dd>predictions for which time are computed for c-index</dd>


<dt>grid_hyperparams</dt>
<dd>hyperparameters grid (or a default will be used )</dd>


<dt>inner_cv</dt>
<dd>number of folds for each CV</dd>


<dt>randomseed</dt>
<dd>randomseed</dd>


<dt>progressbar</dt>
<dd>FALSE(default)/TRUE</dd>

</dl>

survsrf_tune_single: Internal function for survsrf_tune(), performs 1 CV

Description

Usage

Value

Arguments