wwi {weatherindices}

Weighted Weather Indices

Description

Converts the weekly weather data into yearly weighted weather indices with weights being the correlation coefficient between weekly weather data over the years and crop yield over the years

Usage

wwi(y, weatherp)

Arguments

y

A vector of yearly yield data for t years

weatherp

Weekly weather data for t years as vector (total observations= number of years*number of weeks in each year)

Value

A vector of weather indices

References

Jain, R. C., Agrawal, R., & Jha, M. P. (1980). Effect of climatic variables on rice yield and its forecast. MAUSAM, 31(4), 591-596.

Examples

data(Burdwanweather) #Weekly weather data for the rice growing season in Burdwan
data(Burdwanriceyield) #Yearly Yield data of rice  in Burdwan
wwi.maxtem<-wwi(Burdwanriceyield$burdwan,Burdwanweather$Max.Temperature)
wwi.maxtem