Table 1 Parameters of a Random Survival Forest with suggested values
Parameter | Description | Suggested value |
|---|---|---|
ntree | how many subsamples should be performed | 500-1000 |
sampsize | proportion of the data should be selected for each subsample | 63% of available data |
samptype | Sampling Done With Replacement (swr) or without replacement (swor) | swr |
nodesize | number of unique cases in each terminal node | 15 |
mtry | how many variables should be included as candidates for splitting | \(\sqrt {\text {\# variables}}\) |
nsplit | how many splits should be considered for each candidate variable | 10 |
splitrule | impurity measure which aims to create the two most dissimilar daughter nodes at each split | “logrank” |