Hi all, I had the same problem and I was trying to solve with several ways. However it was the most simple thing. While I was extracting the file from Excel to a csv file I was using "," instead of "." inside my numbers (for example "9,28" instead of "9.28") and each column was seperated with a ";" instead of ",". General rule: open your csv file first and see if everything is in position first. Then try mess with R! :-) Hope my silly mistake helps others to save some time.
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