On Tue, 2016-02-09 at 16:56 -0600, Spencer Graves wrote: > Hello: > > > I'm having trouble plotting an object of class "ts" that is in a > data.frame. I can do it with(data.frame, plot(...)) but not with > plot(..., data.frame); see the example below.
The plot function is generic so the actual function call depends on what arguments you give it: plot(y.ts) calls the plot.ts method from the stats package, whereas plot(y.ts ~ x) calls the plot.formula method from the graphics package. Only the plot.formula method has a data argument. What happens when you call plot(y1~x1, data=XY) is that first plot.formula is called and then this calls plot.ts with two arguments (XY$x1 and XY$y1) that are expected to be compatible time series. However, they are not. In fact x1 is numeric and when coerced to a time series it has no time points in common with y1 (which starts at time t=5). Hence the warning about non-intersecting series. Since non-overlapping series seems to be fatal in this context it might be a good idea to give an error at this point. Otherwise I think the function is behaving correctly. Martyn > This work around gets me past this problem. However, I thought > the R Core team might want to know about this if they don't already. > > > Thanks for all your work in making R and CRAN the great tools > that they are -- and I apologize for wasting your time if you are > already familiar with this. > > > Spencer Graves > > > > y.ts <- ts(2:4, 5) > > XY <- data.frame(x1=6:8, y1=y.ts) > > plot(y1~x1, XY) > Error in plot.window(...) : need finite 'xlim' values > In addition: Warning messages: > 1: In .cbind.ts(list(...), .makeNamesTs(...), dframe = dframe, union = > FALSE) : > non-intersecting series > 2: In min(x) : no non-missing arguments to min; returning Inf > 3: In max(x) : no non-missing arguments to max; returning -Inf > 4: In min(x) : no non-missing arguments to min; returning Inf > 5: In max(x) : no non-missing arguments to max; returning -Inf > > plot(y1, XY) > Error in plot(y1, XY) : object 'y1' not found > > with(XY, plot(y1)) > > sessionInfo() > R version 3.2.3 (2015-12-10) > Platform: x86_64-apple-darwin13.4.0 (64-bit) > Running under: OS X 10.11.2 (El Capitan) > > locale: > [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8 > > attached base packages: > [1] stats graphics grDevices utils datasets methods base > > loaded via a namespace (and not attached): > [1] tools_3.2.3 > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel ----------------------------------------------------------------------- This message and its attachments are strictly confidenti...{{dropped:8}} ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel