as.character（）和paste（）是否受给出的数字值的大小限制？

Question

I'm running into some problems with the R function as.character() and paste() : they do not give back what they're being fed...

as.character(1415584236544311111)
## [1] "1415584236544311040"

paste(1415584236544311111)
## [1] "1415584236544311040"

what could be the problem or a workaround to paste my number as a string?

update

I found that using the bit64 library allowed me to retain the extra digits I needed with the function as.integer64() .

Answer 1

Remember that numbers are stored in a fixed number of bytes based upon the hardware you are running on. Can you show that your very big integer is treated properly by normal arithmetic operations? If not, you're probably trying to store a number to large to store in your R install's integer # of bytes. The number you see is just what could fit.

You could try storing the number as a double which is technically less precise but can store larger numbers in scientific notation.

EDIT

Consider the answers in long/bigint/decimal equivalent datatype in R which list solutions including arbitrary precision packages.