Hi Kevin, >> Can anyone give me a short tutorial on the formula syntax? ... I am sorry >> but I could not >> glean this information from the help page on lm.
You can give yourself a very good tutorial by reading ?formula and Chapter 12 of file://localhost/C:/Program%20Files/R/R-2.7.1pat/doc/manual/R-intro.html Mark. rkevinburton wrote: > > I have ussed lm to generate a basic line correlation: > > fit = lm(hours.of.sleep ~ ToSleep) > > Note: From "Bayesian Computation with R", Jim Albert, p. 7 > > I understand the simple y = mx + b line that this fits the data to. Now > apparently I don't understand formulas. The documentation indicates that > there is an implied "intercept" in the formula so now I want to try and > fit the line to a second degree polynomial so I tried: > > ft = lm(hours.of.sleep ~ ToSleep ^ 2 + ToSleep) > > and I still seem to get results that indicate a slope intercept, y = mx + > b, type of fit. Can anyone give me a short tutorial on the formula syntax? > I would like to fit the data to 2nd and higher order polynomials, 1 / x, > log(x), etc. I am sorry but I could not glean this information from the > help page on lm. > > Thank you. > > Kevin > > ______________________________________________ > 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. > > -- View this message in context: http://www.nabble.com/Beginning-lm-tp18668114p18669143.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
