The r4photobiology suite: sun angles and day length
This article is the second in a series of articles describing the different packages in the R4Photobiology suite. The first article in the series gave an overall description of the suite
and the overall design (Aphalo 2015). Starting from the present article, each article in
this series will describe features related to individual classes of problems encountered in photobiological research.
Copyright (c) 2016 Pedro J. Aphalo
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