Hi, Here are two options. I would colour the last point differently, or make it a different shape rather than using an arrow, but its your choice.
x <- 1:10 y <- 1:10 #With an arrow plot(x, y) arrows(x0 = x[length(x)], y0 = y[length(y)] - 1, x1 = x[length(x)], y1 = y[length(y)] - .5) #Overwriting the point with an 'x' #note this is controlled by the pch = 4 argument plot(x, y) points(x = x[length(x)], y = y[length(y)], pch = 4, cex = 1.5, col = "blue") see ?arrows ?plot ?points for documentation. Cheers, Josh On Tue, Jul 27, 2010 at 2:06 PM, Trying To learn again <tryingtolearnag...@gmail.com> wrote: > Hi I want to plot an x,y plot something like an scatter plot. > > I always have the same doubt, were is the last point of my file? > > Imagine it is a time series so I want the last point to indicate with an > arrow (but athomatically if posible). > > Someone knows if it is posible? > > Could it be posible to add additional arrows (with a small square with > text?) > > I hope you can comprehead me? > > I suppose you will say: An arrow? Which width?size? I first need to see how > it looks and if it is posible. > > Many thanks in advance¡¡¡ > > [[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. > > -- Joshua Wiley Ph.D. Student, Health Psychology University of California, Los Angeles http://www.joshuawiley.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.
