On 18-Apr-2013 08:47:18 Janesh Devkota wrote: > Hello, > > I have a big number lets say of around hundred digits. I want to subset > that big number into consecutive number of 5 digits and find the product of > those 5 digits. For example my first 5 digit number would be 73167. I need > to check the product of the individual numbers in 73167 and so on. > > The sample number is as follows: > > > 731671765313306249192251196744265747423553491949349698352031277450632623957831 > 801698480186947885184385861560789112949495459501737958331952853208805511125406 > 98747158523863050715693290963295227443043557 > > I have a problem subsetting the small numbers out of the big number. > > Any help is highly appreciated. > > Best Regards, > Janesh Devkota
Since the number is too large to be stored in any numerical format in R, it needs to be stored as a character string: X <- "731671765313306249....63295227443043557". Then you can easily access successive 5-digit blocks as, e.g. for block i (i = 1:N, where 5*N is the length of the number): block <- substr(X, 1+5*(i-1), 5*i) You now have a 5-character string from which you can extract the individual digits. And then on to whatever you want to do ... Hoping this helps, Ted. ------------------------------------------------- E-Mail: (Ted Harding) <ted.hard...@wlandres.net> Date: 18-Apr-2013 Time: 10:06:43 This message was sent by XFMail ______________________________________________ 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.
