Remove all box around a plot except bottom line (base graphics)
To make the plot clearer I have removed the axes but I wish to remove all the boz except the bottom horizontal line. Using the bty parameter does not seem to enable me to just leave the horizontal line at the foot. I can get the "l" version to remove everything except the left hand side and the base. I could also remove the entire box but that looks odd. Am I reading the documentation incorrectly or is it really impossible?
Michael