quantiles_to_gamma_pars: Function to find parameters for a gamma distn

In srvanderplas/nppd: Functions for Analysis at Nebraska Public Power District

Description

Function to find parameters for a gamma distn

Usage

quantiles_to_gamma_pars(qu, p, init = c(1, 1), quiet = F, ...)

Arguments

qu	location (x) of p-th quantile. Vector of length 2.
p	quantile (i.e. 100*p percent of the observed data is less than qu). Vector of length 2.
init	starting values for optimization. Recommendation: (x, 1), where x is close to the expected value (or median) of your distribution.
...	Other options passed to optim

Value

shape and scale parameters for the gamma distribution, (a, s), where EX = a*s and Var(X) = a*s^2

srvanderplas/nppd documentation built on May 30, 2019, 8:42 a.m.