Preserving large numbers

Question

I am trying to read a CSV file that has barcodes in the first column, but when R gets it into a data.frame, it converts 1665535004661 to 1.67E+12.<

Answer 1

try working with colClasses="character"

read.csv("file.csv", colClasses = "character")

http://stat.ethz.ch/R-manual/R-devel/library/utils/html/read.table.html

Have a look at this link.