On Feb 27, 2013, at 6:18 PM, David Winsemius wrote: > > On Feb 27, 2013, at 4:29 PM, zoe richards wrote: > >> I have a simple question that irritatingly I haven't been able to figure >> out on my own. It seems that some functions from the "Pspline" package are >> successfully installed while others are not. The code with which I'm >> working is more complicated, but the following highlights my problem. If I >> run the following code >> >>> tt <- seq (0,1,length=20) >>> xt <- tt^3 >>> fit <- smooth.Pspline (tt, xt, norder=3,spar=0.0001, method=1) >>> pred<- predict.smooth.Pspline (fit, tt, nderiv=0) >> >> I get this error: >> "Error: could not find function "predict.smooth.Pspline" " >> >> So it seems like "smooth.Pspline" is loading but "predict.smooth.Pspline" >> isn't. Any ideas about why this might be the case? > > Where are you getting the "Pspline" package. I only see a "pspline" package > on CRAN. (I'm surprised you did not get an error when trying to load with > that spelling, so maybe you do have such a package?) My guess is that you > failed to load the package, either through misspelling of not knowing that > package needed to be loaded. One of the reasons that the Posing Guide > requests that all questions be accompanied by the output of sessionInfo() is > to cover cases like this.
In a private message Zoe proved to me that she had loaded the `pspline` package. (You should not reply privately, Zoe.) It only remained to do this (after loading the package): > pred<- predict.smooth.Pspline(fit, tt, nderiv=0) Error: could not find function "predict.smooth.Pspline" > pred<- predict(fit, tt, nderiv=0) > str(pred) num [1:20, 1] 0.004091 0.000253 -0.000499 0.001918 0.007715 ... So in trying to go around the usual dispatch of functions by class you were creating unnecessary confusion. I don't know if maybe the spelling of the class with a period could be the root of the confusion? Go Blue. -- 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.
