On Oct 5, 2014, at 6:50 PM, billy am wrote: > Hi David , > > coef alone won't do as it still contains the description.
It's not a "description", ; in R parlance it's a "name" although that parlance can be confused since there is also a language class called "name". In this case it's an attribute with the name "names". This is a rather special attribute since R gives you a function for setting and removing the "names" attribute. ?'names<-' > attributes(coef(lm(c(1:3, 7, 6) ~ x))[1]) $names [1] "(Intercept)" > As per the example in ?coef shows , > > > > x <- 1:5; coef(lm(c(1:3, 7, 6) ~ x)) > > (Intercept) x > -0.7 1.5 > > > > Unless I use cat again , > > > > x <- 1:5; cat(coef(lm(c(1:3, 7, 6) ~ x))[1]) > > -0.7 > You may be confused about what is happening. The other respondents suggested using `unname` because that function would return a value stripped of the attribute. The `cat` function does not actually return a value; it only creates a side-effect at the console or output to a file: xcf <- cat(coef(lm(c(1:3, 7, 6) ~ x))[1]) -0.7 > xcf NULL So `unname` would be preferable if you were trying to store that value. -- David > Thanks! > Billy > > > > On Mon, Oct 6, 2014 at 8:42 AM, David Winsemius <dwinsem...@comcast.net> > wrote: > ?coef > > Sent from my iPhone > > > On Oct 5, 2014, at 4:21 AM, billy am <wickedpu...@gmail.com> wrote: > > > > Hi , > > > > When I run the following code , I get both the description and the value , > > eg : Intercept and 0.5714286. > > > > Is there a way to extract just the value 0.5714286? Thanks! > > > > > >> x <- c(1,5,3,1)> y <- c(5,8,2,3)> lm(x~y) > > Call: > > lm(formula = x ~ y) > > > > Coefficients: > > (Intercept) y > > 0.5714 0.4286 > >> lm(x~y)$coefficient[1](Intercept) > > 0.5714286 > > > > > >> > > > > Regards > > Billy > > > > [[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. > David Winsemius Alameda, CA, USA ______________________________________________ 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.
