fitFreqdist: Fitting the frequency distribution
In OpVaR: Statistical Methods for Modelling Operational Risk

Description Usage Arguments Details Value Author(s) See Also Examples

Fitting the frequency distribution of operational losses

1	fitFreqdist(cell, distr)

`cell`	A data frame giving the losses (cell$Loss) and the user-defined period (cell$Period) in which the loss occured.
`distr`	The frequency distribution: either "pois" or "nbinom"

First, the number of losses per period is counted. With the results a Poisson or Negative Binomial distribution is fitted for the number of losses per period using a Maximum Likelihood estimator.

Returns a freqdist object with the given distribution fitted to the loss frequency.

Christina Zou

To build a freqdist object independently, use buildFreqdist.

1
2
3

  data(lossdat)
  fitFreqdist(lossdat[[1]],"pois")
  fitFreqdist(lossdat[[2]],"nbinom")

Call:
NULL

Frequency Distribution Object:
---
Distribution: [1] "pois"
Parameters: [1] 49.125
Call:
NULL

Frequency Distribution Object:
---
Distribution: [1] "nbinom"
Parameters: [1] 789.6169642   0.9397495