On Sun, 2006-10-15 at 11:21 -0400, Michael Kubovy wrote: > Dear r-helpers, > > xx <- c(0.000, 0.210, 0.714, 0.514, 1.000, 0.190, 0.590, 0.152) > yy <- c(0.000, 0.265, 0.256, 0.521, 0.538, 0.761, 0.821, 1.000) > aa <- c(19, 19, 19, 21, 19, 21, 21, 21) > x0 <- xx[c(1, 1, 2, 2, 2, 3, 3, 4, 4, 4, 5, 6, 6, 7)] > y0 <- yy[c(1, 1, 2, 2, 2, 3, 3, 4, 4, 4, 5, 6, 6, 7)] > x1 <- xx[c(2, 3, 3, 4, 6, 4, 5, 5, 6, 7, 7, 7, 8, 8)] > y1 <- yy[c(2, 3, 3, 4, 6, 4, 5, 5, 6, 7, 7, 7, 8, 8)] > > plot(yy ~ xx, pch = aa, cex = 3) > segments(x0, y0, x1, y1) > > Can anyone suggest a way of insuring that the lines are hidden behind > the unfilled circles?
Try this: # Set up the plot region plot(yy ~ xx, type = "n") # Draw the segments first segments(x0, y0, x1, y1) # Set the circle (pch) background colors col <- c(rep("black", 3), "white", "black", rep("white", 3)) # Now draw the circles over the line intersections points(xx, yy, pch = 21, bg = col, cex = 3) The "unfilled" circles in this case are actually solid white or black. So instead of altering the point character (pch), we alter the colors. HTH, Marc Schwartz ______________________________________________ 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.