Rank-order association between monthly mean daily global radiation, mean sunshine duration and mean temperature.
A data frame with 12 observations on the following variables.
Mean temperature, ^\circ C.
Global radiation, MJm^2.
Mean sunshine duration, hours.
Sivamadhavi, V. and Selvaraj, R. S. (2012). "Robust regression technique to estimate the global radiation". Indian Journal of Radio & Space Physics, 41, 17–25.