[R] convert large integers to hex
ggrothendieck at gmail.com
Thu May 7 04:18:05 CEST 2009
rSymPy (http://rsympy.googlecode.com) can do that:
Loading required package: rJava
as can r-bc package (http://r-bc.googlecode.com - not on CRAN).
On Wed, May 6, 2009 at 3:26 PM, Sundar Dorai-Raj <sdorairaj at gmail.com> wrote:
> I'm wondering if someone has solved the problem of converting very
> large integers to hex. I know about format.hexmode and as.hexmode, but
> these rely on integers. The numbers I'm working with are overflowing
> and losing precision. Here's an example:
> x <- "6595137340052185552" # stored as character
> as.integer(x) # warning about inaccurate conversion
> format.hexmode(as.numeric(x)) # warnings about loss of precision
> as.hexmode(x) # more warnings and does not do what I expected
> I'm planning on writing a function that will do this, but would like
> to know if anybody already has a solution. Basically, I would like the
> functionality of format.hexmode on arbitrarily large integers.
> R-help at r-project.org mailing list
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
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