ch_rfa_distseason {CSHShydRology} R Documentation

## Distance in seasonal space

### Description

Calculates a matrix of distances between points in the seasonal space that characterizes timing and regularity. It is equivalent to Euclidean distance applied to regularity (radius) and timing (angle) separately.

### Usage

ch_rfa_distseason(x, ...)

## S3 method for class 'numeric'
ch_rfa_distseason(x, a, w = 1/pi, ...)

## S3 method for class 'data.frame'
ch_rfa_distseason(x, w = 1/pi, ...)

## S3 method for class 'formula'
ch_rfa_distseason(form, x, w = 1/pi, ...)


### Arguments

 x, a Coordinates in the seasonal space. Can be a data.frame or vectors with radius x and angle a. ... Other parameters. w Weight to favor angle over radius. By default it is 1/pi, which bring angle in the interval [0,1]. form Formula and dataset providing the coordinates of the seasonal space. Must be of the form radius ~ angle.

### Value

Returns a matrix of distances between points in the seasonal space that characterizes timing and regularity.

Martin Durocher

### References

Durocher, M., Burn, D. H., & Ashkar, F. (2019). Comparison of estimation methods for a nonstationary index-flood model in flood frequency analysis using peaks over threshold. https://doi.org/10.31223/osf.io/rnepc