Last data update: 2014.03.03
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R: determines if measurement was taken during the night
determines if measurement was taken during the night
Description
determines if measurement was taken during the nighttime
Usage
is.night(datetimes, lat)
Arguments
datetimes |
Vector of dates as POSIXct or POSIXlt (see DateTimeClasses ) format
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lat |
Single latitude value of site. South should be negative, north positive
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Value
a boolean vector of same length as datetimes
Author(s)
Luke A. Winslow
See Also
is.day
sun.rise.set
Results
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