Hi, I appreciate if any one could give me clues about the following problem.
I have a map data, x, y, z, and d, where (x,y) is the coordinate of a point and d is a distance from the urban center (0,0), and z is population density. Then I would like to calculate local standard deviations of these points. Let me say hypothetically, x <- rnorm(100) y <- rnorm(100) z <- runif(100) d <- sqrt(x^2+y^2)*runif(100,1,1.5) mod <- gam(z~s(x,y,by=d)) std.res.loc <- residuals/loc.std So, I would like to calculate loc.std. Is there any function available for this? Or should I manually compute it? I am reading "Generalized Additive Model: Introduction to R" by Dr. Wood. Thank you very much. Tk ______________________________________________ R-help@r-project.org mailing list 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.
