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Dear friends, I have a csv file entitled ven.csv located in C:\\, this file contains only two columns:"ve" and "su" I have written the following lines: data=read.csv("c:\\ven.csv",header=TRUE,sep=";"); lm(ve~ su) I have obtained the following message: Error in eval(expr, envir, enclos) : object 've' does not exist. What's the problem? thank

Dear friends, I have written the following lines in R console wich already exist in pdf file systemfit: data( "GrunfeldGreene" ) library( "plm" ) GGPanel <- plm.data( GrunfeldGreene, c( "firm", "year" ) ) greeneSur <- systemfit( invest ~ value + capital, method = "SUR", + data = GGPanel ) greenSur I have obtained the following incomplete