gdhr_model {ChillModels}

GDH Model - Richardson - for heat accumulation

Description

Quantifies the Growing Degree Hours at between the base and optimum temperatures.

Usage

gdhr_model(x, total = TRUE)

Arguments

x

Vector containing temperature values (Celsius-degree).

total

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

Details

The GDH model is based on the subtraction of the base temperature of each hourly temperature between 4.5°C and 25°C. The temperature of the base is 4.5°C. Therefore, accumulation under temperatures below 4.5°C and above 25°C is zero.

Value

The function returns values the GDH for each temperature of vector.

References

RICHARDSON, E.A. et al. 1975. Pheno-climatographyof spring 249 peach bud development. HortScience.

Examples

x <- rnorm(500,8,3)
gdhr_model(x)
gdhr_model(x, FALSE)