# a2p: Convert probability parameters to probabilities In durmod: Mixed Proportional Hazard Competing Risk Model

## Description

mphcrm parametrizes the probabilities that it optimizes. For n+1 probabilities there are n parameters a_j, such that probability P_i = \frac{a_i}{∑_j \exp(a_j)}, where we assume that a_0 = 0.

## Usage

 1 2 3 a2p(a) p2a(p) 

## Arguments

 a a vector of parameters p a vector of probabilities with sum(p) = 1

## Value

a2p returns a vector probabilities with sum 1.

p2a returns a vector of parameters.

## Examples

 1 2 3 4 5 6 7 8 # Draw 5 parameters a <- rnorm(5) a # make 6 probabilities p <- a2p(a) p # convert back p2a(p) 

durmod documentation built on March 31, 2020, 5:23 p.m.