Compute the fork rate of a tree
Compute the fork rate from an aRchi object
ForkRate(aRchi) ## S4 method for signature 'aRchi' ForkRate(aRchi)
aRchi |
a file of class aRchi with at least a QSM and a Path table. |
The fork rate is the mean number of forks per meter of tree height. This metric is computed by browsing tree QSM from the base to the top. Each time a ramification point is encountered it is evaluated as a fork if at least one daughter had a radius not less than 75% of the diameter of the largest daughter. This threshold was chosen in order to exclude non-perennial structures, such as traumatic or epicormic shoots, or branches that will not last on the tree. If the ramification point is a fork, all retained daughter branches are browsed through until the next ramification point and further until the path end. If a daughter is rejected, it is removed as well as all the paths passing through it.
a vector with two numeric value. The number of Fork and the fork rate.
Martin-Ducup, O. et al. Terrestrial laser scanning reveals convergence of tree architecture with increasingly dominant crown canopy position. Functional Ecology (2020).
Clean_QSM to clean a QSM based on a threshold of percentage of largest daughter's diameter.
# Read an aRchi file with a QSM and paths tables.
file=system.file("extdata","Tree_1_aRchi.aRchi",package = "aRchi")
Tree1_aRchi=read_aRchi(file)
# Compute the fork rate of Tree1
ForkRate(Tree1_aRchi)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.