How do I read large numbers precisely in R and perform arithmetic on them?

Question

I am reading a csv file with some really big numbers like 1327707999760, but R automatically converts it into 1.32771e+12. I\'ve tried to assign it a double class but it didn\'t

Answer 1

Excel allows custom formats: Format/Cells/Custom and enter #0

Answer 2

That's not large. It is merely a representation problem. Try this:

options(digits=22)

options('digits') defaults to 7, which is why you are seeing what you do. All twelve digits are being read and stored, but not printed by default.