daylength: photoperiod
In meteor: Meteorological Data Manipulation
Description
Usage
Arguments
Value
References
Examples
Description
Compute photoperiod (daylength, sunshine duration) at a given latitude and day of the year.
Usage
1
photoperiod(doy, latitude)
Arguments
doy
integer. Day of the year. Integer between 1 and 365
latitude
numeric. Latitude, in degrees, should be between -90 and 90
Value
double. Photoperiod in hours
References
Forsythe, W.C., E.J. Rykiel Jr., R.S. Stahl, H. Wu, R.M. Schoolfield, 1995. A model comparison for photoperiod as a function of latitude and day of the year. Ecological Modeling 80: 87-95.
Examples
1
2
3
4
5
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7
photoperiod(50, 52)
photoperiod(50, 5)
photoperiod(180, 55)
p <- photoperiod(1:365, 52)
d <- dateFromDoy(1:365, 2001)
plot(d, p)
meteor documentation built on May 2, 2019, 4:52 p.m.
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Description Usage Arguments Value References Examples
Description
Compute photoperiod (daylength, sunshine duration) at a given latitude and day of the year.
Usage
1 | photoperiod(doy, latitude)
|
Arguments
doy |
integer. Day of the year. Integer between 1 and 365 |
latitude |
numeric. Latitude, in degrees, should be between -90 and 90 |
Value
double. Photoperiod in hours
References
Forsythe, W.C., E.J. Rykiel Jr., R.S. Stahl, H. Wu, R.M. Schoolfield, 1995. A model comparison for photoperiod as a function of latitude and day of the year. Ecological Modeling 80: 87-95.
Examples
1 2 3 4 5 6 7 | photoperiod(50, 52)
photoperiod(50, 5)
photoperiod(180, 55)
p <- photoperiod(1:365, 52)
d <- dateFromDoy(1:365, 2001)
plot(d, p)
|
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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