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spphpr (version 1.1.5)

Spring Phenological Prediction

Description

Predicts the occurrence times (in day-of-year) of spring phenological events. Three methods, including the accumulated degree days (ADD) method, the accumulated days transferred to a standardized temperature (ADTS) method, and the accumulated developmental progress (ADP) method, were used. See Shi et al. (2017a) and Shi et al. (2017b) for details.

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Version

Install

install.packages('spphpr')

Monthly Downloads

227

Version

1.1.5

License

GPL (>= 2)

Maintainer

Peijian Shi

Last Published

June 20th, 2025

Functions in spphpr (1.1.5)

Prediction Function of the Accumulated Developmental Progress Method Using Mean Daily Temperatures

Function for Transferring a Date to the Value of Day-of-Year

Prediction Function of the Accumulated Days Transferred to a Standardized Temperature Method Using Mean Daily Temperatures

Spring Phenological Prediction

Prediction Function of the Accumulated Degree Days Method Using Mean Daily Temperatures

Function for Implementing the Accumulated Degree Days Method Using Mean Daily Temperatures

Function for Implementing the Accumulated Degree Days Method Using Minimum and Maximum Daily Temperatures for the Combinations of the Starting Date and Base Temperature

Function for Implementing the Accumulated Days Transferred to a Standardized Temperature Method Using Mean Daily Temperatures

Function for Implementing the Accumulated Days Transferred to a Standardized Temperature Method Using Minimum and Maximum Daily Temperatures

Function for Implementing the Accumulated Developmental Progress Method Using Mean Daily Temperatures

Daily Air Temperature Data of Beijing from 1952 to 2012.

First flowering date records of Prunus armeniaca

Function for Implementing the Accumulated Degree Days Method Using Mean Daily Temperatures for the Combinations of the Starting Date and Base Temperature

Function for Implementing the Accumulated Developmental Progress Method Using Minimum and Maximum Daily Temperatures

Function for Implementing the Accumulated Degree Days Method Using Minimum and Maximum Daily Temperatures

Prediction Function of the Accumulated Days Transferred to a Standardized Temperature Method Using Minimum and Maximum Daily Temperatures

Prediction Function of the Accumulated Developmental Progress Method Using Minimum and Maximum Daily Temperatures

Prediction Function of the Accumulated Degree Days Method Using Minimum and Maximum Daily Temperatures