sSolver {isotone}R Documentation

Negative Poisson Log-Likelihood

Description

Solver for the negative Poisson log-likelihood

Usage

sSolver(z, a, extra)

Arguments

z Vector containing observed response
a Matrix with active constraints
extra List with element y containing the observed response vector

Details

This function is called internally in activeSet by setting mySolver = sSolver.

Value

x Vector containing the fitted values
lbd Vector with Lagrange multipliers
f Value of the target function
gx Gradient at point x

See Also

activeSet

Examples


##Minimizing Poisson log-liklihood
set.seed(123)
z <- 9:1                   ##predictor values
y <- sample(1:100, 9)      ##response values
btota <- cbind(1:8, 2:9)   ##Matrix defining isotonicity (total order)
fit.poiss <- activeSet(z, btota, sSolver, y = y)

[Package isotone version 0.8-1 Index]