I need some help with a genome-wide association scatterplot. A recently published example of such a plot is attached to this message. Typical variables include: Y: -logP-value (range from 0 to 8) X: chromosomal distance Z: chromosomes 1 through 22 and X (a factor with 23 levels) I used coplot(Y~X|CHR) and xyplot(Y~X|CHR), but I am not sure how to get the entire graph in a single panel (see attached). Please let me know if there is any simple way to produce such a plot using the existing R graphing commands. Thanks! Chris