A detailed discussion is provided here http://www.inside-r.org/packages/cran/visualizationTools/docs/plot.power.htest

A detailed discussion is provided here http://www.inside-r.org/packages/cran/visualizationTools/docs/plot.power.htest

You can use plot with the argument type='l' to plot the first line, then you can add points and lines with the commands ?points and ?lines. You can also specify the colours. Remember to use also xlim and ylim when you call the first plot to make sure that all your points will appear.

Maurizio's suggestion is exactly what I use when plotting multiple lines together.

thank you all. i know your suggestions but i was need the codes for a special case but i found it ..