Hi R users Here is an example of my data (only a small part) Year Season A_Time R_Time O_Time All_Time AandR_Time A_number R_number O_number AandR_number all_number 1999 Winter 9.590741 35.312963 42.759524 23.228431 18.164815 18 9 7 27 34 2000 Winter 9.899537 47.945000 59.744444 20.301333 18.170290 36 10 3 46 49 2001 Winter 12.861364 26.239583 52.350000 23.376068 16.428889 22 8 8 30 38 2002 Winter 11.954902 40.245833 49.025000 19.294025 17.343651 34 8 6 42 48 2003 Winter 6.843750 43.753704 50.533333 16.873246 11.954359 56 9 10 65 75 2004 Winter 7.866216 25.808333 48.381481 16.628931 10.369767 37 6 9 43 52 2005 Winter 11.225194 26.504762 31.432353 17.684804 13.364333 43 7 17 50 67 2006 Winter 11.080000 46.388889 23.820370 17.922414 16.964815 15 3 9 18 27 2007 Winter 12.461628 40.722727 25.557576 20.078788 18.218519 43 11 22 54 76 At the moment I am plotting (using barchart) the A_Time data grouped by season then by year. Here is my code that does this. barchart(A_Time ~ factor(Season), data= .summary_response, main plottitle1, xlab= "Season", ylab= "Time in Minutes", origin = 0, groupsYear) I want to add the A_number data to the plot that I have so far and I want it as little line bars that match up to the bars already on the graph with the axis for the A_number on the right side of the graph and with a different scale. Any help to do this is greatly appreciated. Thanks in advance Jacqueline [[alternative HTML version deleted]]