PT                      Pretransformation function
RI                      Provides 'repeated identity' as accessible
                        function
Rlog                    Provides 'repeated logarithm' as accessible
                        function
Rpow2                   Provides 'repeated power to the 2' as
                        accessible function
Rpow3                   Provides 'repeated power to the 3' as
                        accessible function
RpowM0.5                Provides 'repeated power to the minus 0.5' as
                        accessible function
RpowM1                  Provides 'repeated power to the minus 1' as
                        accessible function
RpowM2                  Provides 'repeated power to the minus 2' as
                        accessible function
Rsqrt                   Provides 'repeated square root' as accessible
                        function
coxphw                  Weighted estimation in Cox regression
fp.power                Provides fractional polynomials as accessible
                        function
plotfp                  Compute and plot nonlinear effect estimated by
                        fractional polynomials
plotw                   Plot weights of weighted estimation in Cox
                        regression
pow2                    Provides 'power to the 2' as accessible
                        function
pow3                    Provides 'power to the 3' as accessible
                        function
powM0.5                 Provides 'power to the minus 0.5' as accessible
                        function
powM1                   Provides 'power to the minus 1' as accessible
                        function
powM2                   Provides 'power to the minus 2' as accessible
                        function
