Dear R-help list, Does anyone have a function that I could use to determine power for 2 way Anova?? an A x B repeated measures study,power is 0.95, I'd like to draw separate lines for three different combinations of A and B: (2,2), (2,5), (2,8). Thanks a lot. Tammy _________________________________________________________________ Show them the way! Add maps and directions to your party invites. http://www.microsoft.com/windows/windowslive/products/events.aspx [[alternative HTML version deleted]]