| cal_event | Event Rate Calculation | 
| cureHR | Control hazard and hazard ratio generation function | 
| evalfup | Visualization of the Relationship between Follow-up and Sample Size | 
| gen.wgt | Weight Function Generation | 
| lung | Lung cancer data set | 
| MaxLRtest | Maximum Weighted Logrank Test | 
| n2pwr.NPH | Power Calculation with Combination Test | 
| phsize | Sample Size Calculation under Proportional Hazards | 
| plot.MaxLR | Graphical Display of Weight Functions | 
| plot.NPHpwr | Graphical Display of Design Parameters in Sample Size Calculation | 
| plotHazSurv | Graphic Display of Hazard and Survival Function | 
| projection.test | Projection test | 
| pwr2n.LR | Sample Size Calculation under Proportional Hazards | 
| pwr2n.NPH | Sample Size Calculation with Combination Test | 
| simu.trial | Simulate Survival Trial Data | 
| summary.NPHpwr | Summary of the 'pwr2n.NPH' function |