"Moral of story, computers do what you tell them, not what you meant."
Not only a fortune, but profound wisdom. Jim On Mon, Feb 2, 2015 at 12:38 PM, Kevin E. Thorpe <kevin.tho...@utoronto.ca> wrote: > Using = has it's problems too. > > For example, > > print(fit <- lm(...)) > > Assigns the result of the lm call to fit and prints the results. This is > quite a useful trick actually. > > print(fit = lm(...)) > > Throws an error. > > Moral of story, computers do what you tell them, not what you meant. > > Kevin > > On 02/01/2015 08:26 PM, Steve Taylor wrote: >> >> All the more reason to use = instead of <- >> >> >> -----Original Message----- >> From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of Ben Bolker >> Sent: Monday, 2 February 2015 2:07p >> To: r-h...@stat.math.ethz.ch >> Subject: Re: [R] the less-than-minus gotcha >> >> Mike Miller <mbmiller+l <at> gmail.com> writes: >> >>> >>> I've got to remember to use more spaces. Here's the basic problem: >>> >>> These are the same: >>> >>> v< 1 >>> v<1 >>> >>> But these are extremely different: >>> >>> v< -1 >>> v<-1 >>> >> >> This is indeed documented, in passing, in one of the pages you listed: >> >> http://tim-smith.us/arrgh/syntax.html >> >> Whitespace is meaningless, unless it isn't. Some parsing ambiguities >> are resolved by considering whitespace around operators. See and >> despair: x<-y (assignment) is parsed differently than x < -y (comparison)! >> > > > -- > Kevin E. Thorpe > Head of Biostatistics, Applied Health Research Centre (AHRC) > Li Ka Shing Knowledge Institute of St. Michael's > Assistant Professor, Dalla Lana School of Public Health > University of Toronto > email: kevin.tho...@utoronto.ca Tel: 416.864.5776 Fax: 416.864.3016 > > > ______________________________________________ > 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.
