Another way is to: plot(...) par(new=T) plot(...) Notes: 1. par(new=T) means the plot area will not be cleared for the next plot. 2. Make sure that both plots have the same xlim, ylim, xlab, ylab, and main so you don't get words printed on top of each other. 3. You can use legend(...) to create a legend to clarify which curve is which Iain's suggest of add=T might be easier! Best regards, Joseph Joseph Poj Gavinlertvatana Doctoral student, Marketing Harvard Business School 203 Wyss Hall, Soldiers Field, Boston, MA 02163 Ph?? 617.230.5907 Fx 617.496.4397 Txt/Vm 617.910.0563 Em pgavinlertvatana at hbs.edu -----Original Message----- From: gov2001-l-bounces at lists.fas.harvard.edu [mailto:gov2001-l-bounces at lists.fas.harvard.edu] On Behalf Of Ashley Anderson Sent: Wednesday, February 17, 2010 10:05 PM To: Class List for Gov 2001/E-2001 Subject: [gov2001] 2 plots, 1 graph Dear all, I'm trying to get two curves to show up on one graph. Any ideas as to how to execute that? -Ashley Anderson _______________________________________________ gov2001-l mailing list gov2001-l at lists.fas.harvard.edu http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l