computeIsDayByHour

tell for each date, whether its daytime

Provide utilities to work with solar time,
i.e. where noon is exactly when sun culminates.
Provides functions for computing sun position and times of sunrise and sunset.

Thomas Wutzler

solartime

Utilities Dealing with Solar Time Such as Sun Position and Time
of Sunrise

computeIsDayByHour function

<dl> <dt>date</dt>
<dd>POSIXct vector</dd> <dt>sunriseHour</dt>
<dd>sunrise as fractional hour (0..24)
(vector of length date or length 1)</dd> <dt>sunsetHour</dt>
<dd>sunset as fractional hour
(vector of length date or length 1)</dd> <dt>duskOffset</dt>
<dd>integer scalar: time in hours after dusk for
which records are still regarded as day</dd></dl>

Arguments

Author

computeIsDayByHour — computeIsDayByHour

<dl>

 <dt>date</dt>
<dd>POSIXct vector</dd>

 <dt>sunriseHour</dt>
<dd>sunrise as fractional hour (0..24)
(vector of length date or length 1)</dd>

 <dt>sunsetHour</dt>
<dd>sunset as fractional hour
(vector of length date or length 1)</dd>

 <dt>duskOffset</dt>
<dd>integer scalar: time in hours after dusk for
which records are still regarded as day</dd>

</dl>

computeIsDayByHour: computeIsDayByHour

Description

Usage

Value

Arguments

Author