Last data update: 2014.03.03
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R: Negative Poisson Log-Likelihood
Negative Poisson Log-Likelihood
Description
Solver for the negative Poisson log-likelihood
Usage
sSolver(z, a, extra)
Arguments
z |
Vector containing observed response
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a |
Matrix with active constraints
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extra |
List with element y containing the observed response vector
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Details
This function is called internally in activeSet by setting mySolver = sSolver .
Value
x |
Vector containing the fitted values
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lbd |
Vector with Lagrange multipliers
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f |
Value of the target function
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gx |
Gradient at point x
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See Also
activeSet
Examples
##Minimizing Poisson log-liklihood
set.seed(12345)
yp <- rpois(9,5)
Atot <- cbind(1:8, 2:9) ##Matrix defining isotonicity (total order)
x0 <- 1:9 ##starting values
fit.poi <- activeSet(Atot, sSolver, x0 = x0, y = yp)
Results
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