Hi,

I am a relatively new to R. So, this is probably a really basic issue that 
I keep hitting.

I read my data into R using the read.csv command:

x = rep("numeric", 3)
CB_un=read.csv("Corn_Belt_unirr.csv", header=TRUE, colClasses=c("factor", 
x))

# I have clearly told R that I have one factor variable and 3 numeric 
variables in this table.
#but if I try to do anything with them, I get an error

boxplot(CB_un["Value"]~CB_un["State.Fips"])

Error in model.frame.default(formula = CB_un["Value"] ~ 
CB_un["State.Fips"]) : 
  invalid type (list) for variable 'CB_un["Value"]'

# Because  these variables are all stored as lists.
#So, I have to unpack them. 

CB_unirr_rent<-as.numeric(unlist(CB_un["Value"]))
CB_unirr_State<-as.factor(unlist(CB_un["State.Fips"]))

#before I can do anything with them

boxplot(CB_unirr_rent~CB_unirr_State)

Is there a reason my data is always imported as lists?  Is there a way to 
skip this upacking step?

Thanks,

Sam
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