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leafSTAR  

Silhouette to Area Ratio of Tilted Surfaces
View on CRAN: Click here


Download and install leafSTAR package within the R console
Install from CRAN:
install.packages("leafSTAR")

Install from Github:
library("remotes")
install_github("cran/leafSTAR")

Install by package version:
library("remotes")
install_version("leafSTAR", "1.0")



Attach the package and use:
library("leafSTAR")
Maintained by
Agustina Ventre Lespiaucq
[Scholar Profile | Author Map]
All associated links for this package
First Published: 2017-09-18
Latest Update: 2017-09-18
Description:
Implementation of trigonometric functions to calculate the exposure of flat, tilted surfaces, such as leaves and slopes, to direct solar radiation. It implements the equations in A.G. Escribano-Rocafort, A. Ventre-Lespiaucq, C. Granado-Yela, et al. (2014) in a few user-friendly R functions. All functions handle data obtained with 'Ahmes' 1.0 for Android, as well as more traditional data sources (compass, protractor, inclinometer). The main function (star()) calculates the potential exposure of flat, tilted surfaces to direct solar radiation (silhouette to area ratio, STAR). It is equivalent to the ratio of the leaf projected area to total leaf area, but instead of using area data it uses spatial position angles, such as pitch, roll and course, and information on the geographical coordinates, hour, and date. The package includes additional functions to recalculate STAR with custom settings of location and time, to calculate the tilt angle of a surface, and the minimum angle between two non-orthogonal planes.
How to cite:
Agustina Ventre Lespiaucq (2017). leafSTAR: Silhouette to Area Ratio of Tilted Surfaces. R package version 1.0, https://cran.r-project.org/web/packages/leafSTAR. Accessed 29 Oct. 2026.
Previous versions and publish date:
No previous versions
Other packages that cited leafSTAR R package
View leafSTAR citation profile
Other R packages that leafSTAR depends, imports, suggests or enhances
Complete documentation for leafSTAR
Functions, R codes and Examples using the leafSTAR R package
Some associated functions: Ahmes . dihedral . fixfile . fixhour . guava . olea . olive . orchids . sal . simu.star.app . simu.star . star.app . star . tilt . tropical . 
Some associated R codes: Ahmes.R . dihedral.R . fixfile.R . fixhour.R . guava.R . olea.R . olive.R . orchids.R . sal.R . simu.star.R . simu.star.app.R . star.R . star.app.R . tilt.R . tropical.R .  Full leafSTAR package functions and examples
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