R read_delim() changes values when reading data-CodePudding

I am trying to read in a tabstop seperated csv file using read_delim(). For some reason the function seems to change some field entries in integer values:

# Here some example data
# This should have 3 columns and 1 row 
file_string = c("Tage\tID\tVISITS\n19.02.01\t2163994407707046646\t40")

# reading that data using read_delim()
data = read_delim(file_string, delim = "\t")

view(data)
data$ID
2163994407707046656 # This should be 2163994407707046646

I totally do not understand what is happening here. If I chnage the col type to character the entry stays the same. Does anyone has an explanation for this?

Happy about any help!

CodePudding user response：

Your number has so many digits, that it does not fit into the R object. According to the specification IEEE 754, the precision of double is 53 bits which is approx. a number with 15 decimal digits. You reach that limit using as.double("2163994407707046646").