[R] ggplot - class "character" problem

[RCulloch]

I suspect it is to do with your method of creating the dataframe, I would
check to see if the columns in the df are numeric, which you can do by: 

is.numeric(flat_data$time) 

for each variable, if it is not numeric (and at least one must be a
character, given the error message) then redefine as a numeric

flat_data$time<-as.numeric(flat_data$time) 

I reckon people better versed in R will have a more efficient solution, but
that should work......

Ross

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