>>>>> "Samuel" == Samuel Edward Kemp <[EMAIL PROTECTED]> >>>>> on Wed, 14 Apr 2004 22:20:24 +0100 writes:
Samuel> Hi, Is there a function in R that lets one represent Samuel> an integer in binary format for a given number of Samuel> bits? So an example would be.... >> binary.function(num=5, num.of.bits=8) "00000101" Samuel> Or, is this something I have to write myself? no. In package "sfsmisc", there's also >> digitsBase package:sfsmisc R Documentation >> >> Digit/Bit Representation of Integers in any Base >> >> Description: >> >> Compute the vector of "digits" A of the 'base' b representation of >> a number N, N = sum(k = 0:M ; A[M-k] * b^k). >> >> Usage: >> >> digitsBase(x, base = 2, ndigits = 1 + floor(log(max(x), base))) e.g., > library(sfsmisc) # after installing it > digitsBase(5, base= 2, 10) [,1] [1,] 0 [2,] 0 [3,] 0 [4,] 0 [5,] 0 [6,] 0 [7,] 0 [8,] 1 [9,] 0 [10,] 1 > empty.dimnames(digitsBase(0:33, 2)) # binary 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 where you see that it does work vectorized. ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html