D ear community, This is to kindly request for your help. I have an error from regression of values in one stack with another # s1 and s2 have 720 layers; coefficients[2] is the slope
### script rstack1 <- stack(s1,s2) s <- stack('D:/Correlation/rstack.tif') fun <- function(x) { lm(x[1:360] ~ x[361:720])$coefficients[2] } x1 <- calc(s, fun) I get the following error: Error in .calcTest(x[1:5], fun, na.rm, forcefun, forceapply) : cannot use this function Many thanks for your help in sloving this problem John [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.