[R] Using ADF.Test

[matifou]

ehxpieterse wrote:
> 
> Hi,
> 
> I am quite new to R and would appreciate some guidance, if possible.
> 
> I have imported a csv file: spread <- read.csv("Spread.csv")
> 
> I get the following error when I try to run adf.test:
>> adf.test(spread,alternative = c("stationary", "explosive"),0)
> Error in embed(y, k) : 'x' is not a vector or matrix
> 
> Why is this?
> 


What does
class(spread) give?
You should try as.vector(spread) and see what happens
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