After some interesting discussions on r-help list, the suggestion was
made that I could also probably gain some useful insights on this
teaching listserve, a resource that I didn't know about previously.
I participate peripherally on a listserve for middle- and high-school
science teachers.
A few thoughts. You can do what you want with them.
1) Use R formulas.
If you lattice graphics, then lm() and plots have essentially the same
syntax and you can make nice connections between the graphs and the
analyses. For example,
bwplot( weightLoss ~ diet ) or xyplot (weightLoss ~
