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pheno (version 1.7-0)

Auxiliary Functions for Phenological Data Analysis

Description

Provides some easy-to-use functions for time series analyses of (plant-) phenological data sets. These functions mainly deal with the estimation of combined phenological time series and are usually wrappers for functions that are already implemented in other R packages adapted to the special structure of phenological data and the needs of phenologists. Some date conversion functions to handle Julian dates are also provided.

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Version

Install

install.packages('pheno')

Monthly Downloads

227

Version

1.7-0

License

GPL (>= 2)

Maintainer

Maximilian Lange

Last Published

May 12th, 2022

Functions in pheno (1.7-0)

Converts a date (day,month,year) to Julian date

Connected sets in a matrix

Number of days between two dates

Example of a two-way classification table

Simple example of a two-way classification table

Phenological observations

Daylength at julian day i on latitude l

Converts string date to Julian date

Converts Julian date into string date

getConnectedSets

Finds connected sets in a matrix or data frame

Maximal day length on latitude l

Dense design matrix for phenological data

Fits a two-way linear mixed model

Fits a robust two-way linear model

Sequential Mann-Kendall test for time series.

Kendall's normalized tau

Converts a numeric data frame to matrix

maxConnectedSet

Maximal connected set in a matrix

Converts numeric matrix to data frame

Fits a two-way linear fixed model

Converts Julian date to integers day,month,year

Boolean test for leap year