ch_rfa_extractamax

ch_rfa_extractamax.formula

ch_rfa_extractamax.default

Extracts the annual maxima of a daily time series

A collection of user-submitted functions to aid in the analysis of hydrological data, particularly for users in Canada. The functions focus on the use of Canadian data sets, and are suited to Canadian hydrology, such as the important cold region hydrological processes and will work with Canadian hydrological models. The functions are grouped into several themes, currently including Statistical hydrology, Basic data manipulations, Visualization, and Spatial hydrology. Functions developed by the Floodnet project are also included. CSHShydRology has been developed with the assistance of the Canadian Society for Hydrological Sciences (CSHS) which is an affiliated society of the Canadian Water Resources Association (CWRA). As of version 1.2.6, functions now fail gracefully when attempting to download data from a url which is unavailable.

Kevin Shook

CSHShydRology

Canadian Hydrological Analyses

Paul Whitfield

Robert Chlumsky

Daniel Moore

Martin Durocher

Matthew Lemieux

Jason Chiang

Joel Trubilowicz

SJ Kim

ch_rfa_extractamax function

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

Arguments

Author

Extracts the annual maxima of a daily time series — ch_rfa_extractamax

<dl>

<dt>x</dt>
<dd>Data. If no formula is passed, the first column must be the
value and the second the date.</dd>


<dt>...</dt>
<dd>Other parameters.</dd>


<dt>form</dt>
<dd>Formula of the form <code>value ~ date</code> that specifies the
variable from which the annual maximums are extracted and a date variable.</dd>


<dt>tol</dt>
<dd>Filter the years having less than <code>tol</code> days.</dd>


<dt>nlab, ylab</dt>
<dd>Names for the added columns representing respectively 
the number of yearly observations and the year. 
If set to <code>NULL</code> the given column is not added.</dd>

</dl>

Extracts the annual maxima of a daily time series

ch_rfa_extractamax: Extracts the annual maxima of a daily time series

Description

Usage

Value

Arguments

Author

Examples