Hi, Just to signal that when I want to plot POSIXct variable on x using format within plot(), I get what I want on the plot but with a number of warnings:
> plot(y~x,format="%y-%m") Warning messages: 1: "format" is not a graphical parameter in: plot.window(xlim, ylim, log, asp, ...) 2: "format" is not a graphical parameter in: plot.xy(xy, type, pch, lty, col, bg, cex, lwd, ...) 3: "format" is not a graphical parameter in: axis(side, at, labels, tick, line, pos, outer, font, lty, lwd, 4: "format" is not a graphical parameter in: box(which = which, lty = lty, ...) 5: "format" is not a graphical parameter in: title(main, sub, xlab, ylab, line, outer, ...) I suppose that format may not be at the right place in plot() or/and not handled by the functions called from there, however the documentation (?plot.POSIXct) seems to allow passing this argument: ...: Further arguments to be passed from or to other methods, typically graphical parameters or arguments of 'plot.default'. For the 'plot' methods, also 'format'. Any comment? Patrick ______________________________________________ R-help@stat.math.ethz.ch 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.