yes this is exactly what I want and it works. thanks. -----Original Message----- From: "JS Huang" [js.hu...@protective.com] Date: 02/26/2015 03:22 AM To: r-help@r-project.org Subject: Re: [R] How many digits are there in left of dot of 0.0001 ?
Hi, To get the number of digits to the right of decimal point: nchar(format(a,scientific=FALSE))-(trunc(log10(max(1,trunc(abs(a)))))+1) -1. The part (trunc(log10(max(1,trunc(abs(a)))))+1) is the number of digits to the left of decimal. At the end, subtract 1 for the decimal point. Negative number needs more work. > options(digits=10) > a <- 0.0001 > nchar(format(a,scientific=FALSE))-(trunc(log10(max(1,trunc(abs(a)))))+1) > -1 [1] 4 > a <- 999.123456 > nchar(format(a,scientific=FALSE))-(trunc(log10(max(1,trunc(abs(a)))))+1) > -1 [1] 6 -- View this message in context: http://r.789695.n4.nabble.com/How-many-digits-are-there-in-left-of-dot-of-0-0001-tp4703842p4703849.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
