ch_rfa_extractamax {CSHShydRology}

R Documentation

Extracts the annual maxima of a daily time series

Description

Extracts the annual maxima of a daily time series

Usage

ch_rfa_extractamax(x, ...)

## S3 method for class 'formula'
ch_rfa_extractamax(form, x, tol = 0, ...)

## Default S3 method:
ch_rfa_extractamax(x, tol = 0, nlab = "n", ylab = "yy", ...)

Arguments

x	Data. If no formula is passed, the first column must be the value and the second the date.
...	Other parameters.
form	Formula of the form value ~ date that specifies the variable from which the annual maximums are extracted and a date variable.
tol	Filter the years having less than tol days.
nlab, ylab	Names for the added columns representing respectively the number of yearly observations and the year. If set to NULL the given column is not added.

Value

Returns a data frame containing the annual (Monthly) maxima, the date and the number of observations during the year.

Author(s)

Martin Durocher

Examples

out <- ch_rfa_extractamax(flow ~ date, CAN01AD002, tol = 350)
head(out)

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