Re: [R] plotting results from tapply; using indexing to incorporate error bars

Mike, Using interaction.plot(): with(ex.dat, interaction.plot(x1, x2, response = y1, type = "b", pch = 21, col = c("red", "blue"), ylim = range(ex.dat$y1))) arrows(1:2, xbar + sem, 1:2, xbar - sem,

Re: [R] plotting results from tapply; using indexing to incorporate error bars

Hi, Mark Thanks for the examples- this is great, and has helped me understand alot more what's going on in the plotting functions. Now that I'm trying to work error bars into this, I was curious if someone might give me a hand indexing this properly so that I can format my error bars to match