Hi.  I used R years ago at Uni but haven't touched it since, so I'm back to beginner level now.  After looking through the manuals for a while I've come to the conclusion I don't know where to start looking for what I'm looking for, so I decided to ask for help.

I've got a fairly simple data frame with an identifier, period and score.  There are a few hundred seperate identifiers and the period is from 0 to 36.  I'd like to pivot this so that it's a matrix of scores, with identifiers as column headers and periods as row headers.  I'd then like to run an ARIMA on each of the columns.

Thanks
Murray


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