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pdi  

Phenotypic Index Measures for Oak Decline Severity
View on CRAN: Click here


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

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

Install by package version:
library("remotes")
install_version("pdi", "0.4.2")



Attach the package and use:
library("pdi")
Maintained by
Jasen Finch
[Scholar Profile | Author Map]
All associated links for this package
First Published: 2020-08-19
Latest Update: 2021-02-09
Description:
Oak declines are complex disease syndromes and consist of many visual indicators that include aspects of tree size, crown condition and trunk condition. This can cause difficulty in the manual classification of symptomatic and non-symptomatic trees from what is in reality a broad spectrum of oak tree health condition. Two phenotypic oak decline indexes have been developed to quantitatively describe and differentiate oak decline syndromes in Quercus robur. This package provides a toolkit to generate these decline indexes from phenotypic descriptors using the machine learning algorithm random forest. The methodology for generating these indexes is outlined in Finch et al. (2121) .
How to cite:
Jasen Finch (2020). pdi: Phenotypic Index Measures for Oak Decline Severity. R package version 0.4.2, https://cran.r-project.org/web/packages/pdi. Accessed 07 Aug. 2026.
Previous versions and publish date:
(2026-07-09 06:40), 0.4.1 (2020-08-19 10:20), 0.4.2 (2021-02-09 18:40)
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