Hi, 1) par(ask=TRUE) histogram(~Y|F1 * F2 * F3,data = ...) Successively displays many plots as the # of levels in F3 w/o asking for input between each. In other words I only get to see the plot for the last level. What's the right commands? 2) Also I am wondering if there are plot objects i.e. something like obj<-plot(x,y) Thanks!