Dear all,
I'm trying to construct confidence intervals for a LOWESS estimation (by not using bootstrapping). I have checked previous posts and other material online and I understand that the main procedure is: my.count<- seq(...) fit<- loess (y ~ x, data=z) pred<- pred(fit, my.count, se=TRUE) and then the plotting. However, it's not working; as confidence intervals I get meaningless dashed lines with no reference to the underlying loess estimation. I think that my main problem is with the seq command, whose role and function I don't really get. My (x;y) space refer to (income; price) across countries. A previous thread was mentioning that the variables on the X-axis should be equi-spaced; obviously in my case they are not. Is that the problem? If yes, how can I fix it? Can anyone help? Many thanks, fadi Please access the attached hyperlink for an important electronic communications disclaimer: http://lse.ac.uk/emailDisclaimer ______________________________________________ [email protected] 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.
