Package 'DegreeDayCalc'

Title: Degree-Day Phenology Calculator ('shiny' Application)
Description: Provides a 'shiny' application to compute daily and cumulative degree-days from minimum and maximum temperatures using average, single triangle, and single sine methods, with optional upper temperature thresholds. The application maps cumulative thermal accumulation to user-defined developmental stage thresholds and supports exporting tabular and graphical outputs. The degree-day approach follows assumptions described by Higley et al. (1986) <doi:10.1093/ee/15.5.999>.
Authors: Victor Manuel Almaraz Valle [aut, cre] (ORCID: <https://orcid.org/0000-0002-3673-8002>), J. Concepción Rodríguez Maciel [aut], Gustavo Ramírez Valverde [aut], Jaime Alfredo Urzua Gutierrez [aut], Manuel Alejandro Tejeda Reyes [aut]
Maintainer: Victor Manuel Almaraz Valle <[email protected]>
License: MIT + file LICENSE
Version: 0.1.1
Built: 2026-07-02 21:13:44 UTC
Source: https://github.com/cran/DegreeDayCalc

Help Index

Compute degree-days from daily minimum and maximum temperatures

Description

Calculates daily degree-days (thermal units) from Tmin and Tmax using several common methods (average, triangular, sine). Optionally, an upper threshold (Tupper) can be applied in methods supporting it.

Usage

degree_days(
  Tmin,
  Tmax,
  Tbase,
  Tupper = NULL,
  method = c("average", "average_cut", "triangle", "triangle_upper", "sine",
    "sine_upper")
)

Arguments

Tmin

Daily minimum temperature (°C).
Tmax

Daily maximum temperature (°C).
Tbase

Base (lower developmental threshold) temperature (°C).
Tupper

Optional upper temperature threshold (°C). Required for "triangle_upper" and "sine_upper" methods.
method

Degree-day method. One of "average", "average_cut", "triangle", "triangle_upper", "sine", "sine_upper".

Value

A numeric value (degree-days) rounded to 3 decimals.

DegreeDayCalc

Description

Launch the DegreeDayCalc Shiny application for degree-day phenology calculations and visualization of cumulative thermal requirements across life stages.

Usage

DegreeDayCalc()

Value

Runs a Shiny application in the default browser (or viewer).

Examples

if (interactive()) {
  DegreeDayCalc()
}