| calc_chunks | Calculate data chunk indices |
| calc_duration | Calculate durations of time |
| chunk_data_ | Break data into chunks |
| cusum_failure | Cumulative Sum of Failures |
| cusum_loglike | Cumulative Sum of Log-Likelihood Ratio |
| cusum_ome | Cumulative Sum of Observed Minus Expected Outcome |
| cusum_sprt | Risk-adjusted Sequential Probability Ratio Test (SPRT) |
| paste | Concatenate strings |
| paste0 | Concatenate strings |
| paste_efs | Paste event-free survival |
| paste_freq | Paste frequency |
| paste_mean | Paste mean |
| paste_median | Paste median |
| paste_pval | Paste p-value |
| test_hypothesis | Test the null hypothesis |
| test_hypothesis.factor | Test the null hypothesis |
| test_hypothesis.logical | Test the null hypothesis |
| test_hypothesis.numeric | Test the null hypothesis |