GetEstimate_ROUGH: Rough estimate of a distribution

In HydroPortailStats: 'HydroPortail' Statistical Functions

Rough estimate of a distribution

Description

Returns a rough first-guess estimate of a distribution. This estimate may be poor but it solely aims at being used as a starting point for more advanced estimation approaches (e.g. max-likelihood or Bayesian). It is therefore chosen as an easy-to-compute explicit formula, robust and error-proof.

Usage

GetEstimate_ROUGH(y, dist)

Arguments

y	numeric vector, data
dist	character, distribution name

Value

A list with the following components:

par	numeric vector, estimated parameter vector.
obj	numeric, objective fonction (NA for this estimate)
ok	logical, did computation succeed?
err	integer, error code (0 if ok)
message	error message

Examples

y=c(9.2,9.5,11.4,9.5,9.4,9.6,10.5,11.1,10.5,10.4)
GetEstimate_ROUGH(y,'Normal')
GetEstimate_ROUGH(y,'LogNormal')
GetEstimate_ROUGH(y,'Gumbel')
GetEstimate_ROUGH(y,'GEV')
GetEstimate_ROUGH(y,'Poisson')

HydroPortailStats documentation built on Sept. 12, 2024, 9:36 a.m.