ChillModels (version 1.0.2)

heat_restriction: Heat Restriction model

Description

Quantifies the chill accumulation by Utah Model and North Carolina Model.

Usage

heat_restriction(x, model, nh, total = TRUE)

Arguments

x

Vector containing temperature values (Celsius-degree).

model

Model to be used for calculation. Use "utah" for Utah Model and "nc" for North Carolina Model.

nh

Number of hours of continuous heat.

total

TRUE Shows the total value of accumulation, FALSE shows the value of chill-unit for each temperature (TRUE is default).

Value

The function returns values the chill-units for each temperature of vector (Total = FALSE), or returns the chill-units accumulation (Total = TRUE).

Details

The model is based on chill-units (Utah Model or North Carolina Model). After a certain number of hours of heat, the counting the negative units is interrupted. Negativation of the cold by the heat is restricted to a few days, 24h for Raseira (1982), 96h for Ebert (1986), 30 hours for Fishmann (1987) and 36 hours for Anzanello (2012).

Examples

# NOT RUN {
x <- rnorm(500, 15, 5)

#5 hours of heat to stop counting the negative units.
heat_restriction(x, model = "nc",nh = 5)

#24 hours of heat to stop counting the negative units.
heat_restriction(x, model = "nc", nh = 24)

# }