[R] barplots with 2 different scales

Is there a way to create barplots with pairs of bars plotted on 2 different scales (i.e some bars would be plotted according to the scale on the y-axis on the left and other bars plotted according to a different scale on the right axis)? Thank you, Jeremy [[alternative HTML version d

[R] radial.plot(plotrix) - plotting multiple polygons?

Is it possible to plot multiple polygons on radial.plot(plotrix)? The new=FALSE argument (as used to add additional points or lines with the plot function to an existing plot) doesn't appear to work. I would like to overlay the outlines of multiple polygons of different colors on the same radial pl

[R] problem installing and updating packages

I am having a problem installing and updating packages. It doesn't happen with every package I try to install or update, but most of them. I get this warning message: Warning: unable to move temporary installation 'C:\Program Files\R\R-2.8.0\library\file5f906952\rpart' to '[EMAIL PROTECTED] $2'