How to stop read.table from rounding numbers with different degrees of precision in R? [duplicate]

Answer 1

read.table doesn't round (unless you provide more than ~16 digits behind the comma), but indeed the precision to which the answer is printed may be controlled with options(digits=[n])

Answer 2

As pointed our by @Mark, it's just a display issue. The read.table is treating the 2nd column as a numeric. You can force read it as a char as follows to display all digits while printing the data frame. Say you have the data in the file test.txt... The following will generate the desired output

df <- read.table("test.txt", sep=" ",colClasses = c("character", "character"))

Answer 3

You could try options(digits(), like so:

options(digits=5)
35.326354762000001
#[1] 35.326
options(digits=20)
35.326354762000001
#[1] 35.326354762000001