[R] binary to decimal number

[Uwe Ligges]

"E.L. Willighagen" wrote:
> 
> Hi all,
> 
> is there a method for transforming 1010 into 10, i.e. a binary number
> into a decimal value?

I don't have a clever idea right now, but the following should do the
trick, if your binary number is called "b":

 bindec <- function(b) 
   sum(as.integer(unlist(strsplit(b, ""))) * 2^(floor(log10(b)):0))

 bindec(b)

Uwe Ligges
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