dectime2Date

Convert time data expressed as year and fractional part of year to class "Date."

manip

internal

Enable users to evaluate long-term trends using a Generalized
Additive Modeling (GAM) approach. The model development includes selecting a
GAM structure to describe nonlinear seasonally-varying changes over time,
incorporation of hydrologic variability via either a river flow or salinity,
the use of an intervention to deal with method or laboratory changes
suspected to impact data values, and representation of left- and
interval-censored data. The approach has been applied to water quality data
in the Chesapeake Bay, a major estuary on the east coast of the United
States to provide insights to a range of management- and research-focused
questions. Methodology described in Murphy (2019)
<doi:10.1016/j.envsoft.2019.03.027>.

Erik Leppo

baytrends

Long Term Water Quality Trend Analysis

dectime2Date function

<dl><dt>x</dt>
<dd>the decimal date to convert.</dd>
<dt>Date.noon</dt>
<dd>correct from noon correction for <code>dectime</code>.</dd></dl>

Arguments

Date Conversion — dectime2Date

<dl>

<dt>x</dt>
<dd>the decimal date to convert.</dd>


<dt>Date.noon</dt>
<dd>correct from noon correction for <code>dectime</code>.</dd>

</dl>

dectime2Date: Date Conversion

Description

Usage

Value

Arguments

Details

See Also

Examples