On Thu, 2006-09-07 at 12:14 -0500, Hao Chen wrote: > Hello Marc Schwartz > > On Thu, Sep 07, 2006 at 07:54:05AM -0500, Marc Schwartz wrote: > > On Thu, 2006-09-07 at 06:18 -0500, Hao Chen wrote: > > > Hi, > > > > > > I am using barplot and would like to know if it is possible to have bars > > > filled with one color while use a different color for the shading lines. > > > > > > The following code colors the shading lines, leaving the bars in white: > > > > > > barplot(1:5, col=c(1:5), density=c(1:5)*5) > > > > > > while the colors are applied to the bars when density is removed. > > > > > > barplot(1:5, col=c(1:5)) > > > > > > I did check ?barplot and found the following: > > > > > > col: a vector of colors for the bars or bar components. > > > > > > Thanks, > > > > > > Hao > > > > Note the key word 'or' in the description of the 'col' argument. > > > > You need to make two separate calls to barplot(). The first using the > > fill colors, then the second using the shading lines AND setting 'add = > > TRUE', so that the second plot overwrites the first without clearing the > > plot device. > > > > barplot(1:5, col=c(1:5)) > > > > barplot(1:5, col = "black", density=c(1:5), add = TRUE) > > > > Just be sure that any other arguments, such as axis limits, are > > identical between the two calls. > > > > HTH, > > > > Marc Schwartz > > > > > Thank you very much for your help. It works but only in the order as you > put it, since the following code only shows the color, but not the > shading lines: > > barplot(1:5, col = "black", density=c(1:5)) > barplot(1:5, col=c(1:5), add = TRUE) > > Hao Chen
That is correct. The sequence is important, as the shading lines are drawn with a transparent background, enabling the original color to be seen. Reversing the order, you are overplotting the shading lines with opaque colored rectangles. Hence, the lines are lost. HTH, Marc ______________________________________________ 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.
