reverseSoftmax: Reverse of the Softmax Function

In rettopnivek/utilityf: Useful Functions for Modeling and Plotting

Description

A function that, given a vector of probabilities that sum to one, will determine the closest values that could be passed to the softmax function to produce those probabilities using the optim function.

Usage

reverseSoftmax(y, init = NULL, restrict = NULL)

Arguments

y	a vector of probabilities (positive, sum to 1).
init	the starting values for the optim function. If empty, generates random values from a normal distribution.
restrict	a logical vector indicating whether certain values of x should be fixed to 0.

Value

The output from the optim function.

Examples

set.seed(984)
input = rnorm(5)
sm = softmax( input )
output = reverseSoftmax( sm )
round(sm,3)
round(output$par,3)

rettopnivek/utilityf documentation built on March 1, 2021, 7:05 p.m.