> -----Original Message----- > From: r-help-boun...@r-project.org > [mailto:r-help-boun...@r-project.org] On Behalf Of mau...@alice.it > Sent: Sunday, March 29, 2009 12:23 PM > To: r-help@r-project.org > Subject: [R] binary AND operators in R > > I cannot find any R function or operator that performs a > binary AND operation, as performed by Fortran built-in > function "iand". > Ideally either R operator "&" or "&&" should do that. But > some tests proved they do not: > > A<- 1 > > B <- 2 > > A > [1] 1 > > B > [1] 2 > > as.numeric(A&B) > [1] 1 > > as.numeric(A&&B) > [1] 1 > > The binary content of A should be "10000" > The binary content of B should be "01000" > Therefore the bitwise AND operator should yield 0 ! > I do not know how to fore the binary representation of an > unsigned integer when writing R code. > Do you know how to get around this problem ? > > Thank you so much. > Maura >
Maura, I tried the search command ??bitwise And found the package bitops on CRAN. Check and see if it has what you need. Hope this is helpful, Dan Daniel Nordlund Bothell, WA USA ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
