sales<-read.csv("Y:/Documents/STAT/attachments/RestaurantSales.txt",header=T) attach(sales) Time<-as.numeric fMonth<-as.factor model1<-lm(Sales~Time+I(Time^2)+I(Time^3)+I(Time^4)+fMonth);summary(model1) Error in Time^2 : non-numeric argument to binary operator
Please help me get rid of the error in the last line
The two lines
Time <- as.numeric fMonth <- as.factor
are probably not doing what you think they are. They are storing the functions, not converting any column in the data set. Do you mean
Time <- as.numeric(Time) fMonth <- as.factor(fMonth)
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