wki {ClimInd}

Winkler index

Description

Sum of degree days over 10 celsius of TG from April 1 until October 31

Usage

wki(data, data_names = NULL, na.rm = FALSE, ...)

Arguments

data

daily mean temperature, Celsius

data_names

names of each period of time

na.rm

logical. Should missing values (including NaN) be removed?

...

further arguments passed to or from other methods

Value

temperature, Celsius

References

Winkler, A.J., J.A. Cook, W.M. Kliewer, and L.A. Lider. 1974. General Viticulture. 4th ed. University of California Press, Berkeley.

Examples

data(data_all)
wki(data = data_all$tg)