I have database write as .csv file. When I want to get sth from my database I get NULL, but I know that there is sth! For example:
> data$ID NULL > data$kod NULL but command like below is always recognize by R > data[2,3] [1] '082' In my opinion this problem is also connect with my attempt to create a tree. I always get errors. > t.tree0=rpart(ID~.,t.train) Error in eval(expr, envir, enclos) : object "ID" not found > t.tree0=rpart(kod~.,t.train) Error in eval(expr, envir, enclos) : object "kod" not found What I should do to create my simple trees? -- View this message in context: http://www.nabble.com/data%24ID--%3E-I-always-get-a-NULL-tp23128214p23128214.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
