[R] unique and precision of long integers

[Michael Herron]

Hello.

I have a dataset with about 500,000 observations, most of which are
not unique.  The first 10 observations look like

901000000000100000010100101011002
901101101110100000010100101011002
901000000000100000010100000001002
901000000000100000010101001011002
901000000000100000010101010011002
901000000000100000010100110101002
901000000000100000010100101011002
900000000000100000010010101011002
901000000000100000010100101101002
901000000000100000010100101011002

Each digit reflects a separate field, but above all spaces are
removed.

I read in the data with scan(), and then use unique() to get the
unique observations.  But, when I print these elements to a file I
lose precision.  For instance, let x be a vector of the first 10
observations from the dataset:

> write (x,file="output",ncol=1)

more output 

9.01e+32
9.011011e+32
9.01e+32
9.01e+32
9.01e+32
9.01e+32
9.01e+32
9e+32
9.01e+32
9.01e+32

Is there a way to get all the digits back?  

> write (format(x,digits=22),file="output",ncol=1) 

does not do it, and I cannot seem to increase digits >22.

thanks, 

michael
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._