The digits option gives you the number of significant digits (ignoring leading zeros after the decimal) and it operates on a column by column basis. The first and second columns have values with a leading zero after the decimal (-0.04074 in both columns) so R prints five decimal places to get four significant digits (4074). In the third and fourth columns four decimals are enough so R uses that.
The round() function lets you specify the number of decimal places directly: round(vars, 4) To set and reset the "digits" option: oldpar <- options(digits=4) # Set digits and save the default value # Commands using digits=4 options(oldpar) # Resets to the default value ------------------------------------- David L Carlson Department of Anthropology Texas A&M University College Station, TX 77840-4352 -----Original Message----- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of Qiang Kou Sent: Tuesday, March 25, 2014 8:45 AM To: Pavneet Arora Cc: R help Subject: Re: [R] Digits in R Have you tried "round(vars, digits = 4)" ? KK On Tue, Mar 25, 2014 at 7:17 AM, Pavneet Arora < pavneet.ar...@uk.rsagroup.com> wrote: > Hello All, > > I am new in R, so please excuse the basic questions. > But how do you change the number of digits to be displayed? > > I have done the following, hoping I will get 4 decimal places in my > answer: > > vars <- var(cbind(Sepal.l,Sepal.w,Petal.l,Petal.w)) > print(vars,digits=4) > > But as seen below from the output, that is not the case > > > print(vars,digits=4) > Sepal.l Sepal.w Petal.l Petal.w > Sepal.l 0.68569 -0.04074 1.2743 0.5163 > Sepal.w -0.04074 0.19363 -0.3287 -0.1212 > Petal.l 1.27432 -0.32873 3.1163 1.2956 > Petal.w 0.51627 -0.12124 1.2956 0.5810 > > How come the Sepal.l and Sepal.w does not come with only 4 decimal places. > Can someone tell me where I am going wrong? > > Also if I use the "options(digits=4)"- How do I make it to go back to > Normal or default, which is 7 in this case.? > > **************************************************************** **************************************************************** **************************************************************** *********************** > MORE TH>N is a trading style of Royal & Sun Alliance Insurance plc (No. > 93792). Registered in England and Wales at St. Mark's Court, Chart Way, > Horsham, West Sussex, RH12 1XL. > > Authorised by the Prudential Regulation Authority and regulated by the > Financial Conduct Authority and the Prudential Regulation Authority. > > **************************************************************** **************************************************************** **************************************************************** ************************ > > [[alternative HTML version deleted]] > > > ______________________________________________ > 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. > > -- Qiang Kou q...@umail.iu.edu School of Informatics and Computing, Indiana University [[alternative HTML version deleted]] ______________________________________________ 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. ______________________________________________ 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.
