Dear list members. I have problems with the usage of cv.glm from the boot package. Here are some parts of the script I wanted to use:
data <- read.table("selected_2D.csv", header=TRUE, sep=",") … glm.fitted <- glm("ydata$ y ~ 1 + density + vsurf_ID6 + vsurf_S ", data=data) error <- cv.glm(data=data, glm.fitted, K=6) ydata$y is a separate data set, where I take my independent data from. I build an equation with some of the columns in data. Then I generate the generalized linear model, which works. But when I try to run the last line – the cv.glm function, I get the following error message: Error in model.frame.default(formula = eqfull, data = list(vsurf_ID6 = c(2.4599824, : variable lengths differ (found for 'density') I fear I don't get the meaning of the error message at all. The length of the data columns are all equal. Any help would be kindly appreciated! Best wishes, Markus ______________________________________________ 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.