I would like to display some results from simulations in the form of a Gantt chart (progress) with a barchart (production) of another variable below (something very similar to coplot charts). I'm not sure if I should attempt to build this from scratch (using grid or some of the basic graphics features) or if there's a similar feature in one of the existing packages. I need to take the following (truncated) results, unit,week,machine,volume,pdxratio 0,14,1,925.402525,1.000000 0,15,1,925.402525,1.000000 0,16,1,925.402525,1.000000 0,17,1,702.792425,0.759445 1,46,1,1007.664896,1.000000 1,47,1,1007.664896,1.000000 1,48,1,1007.664896,1.000000 1,49,1,563.005311,0.558723 2,33,1,1019.781108,1.000000 2,34,1,1019.781108,1.000000 2,35,1,1019.781108,1.000000 2,36,1,697.656677,0.684124 3,41,2,1043.451341,1.000000 3,42,2,1043.451341,1.000000 3,43,2,1043.451341,1.000000 3,44,2,741.645977,0.710762 4,7,2,1048.494508,1.000000 4,8,2,1048.494508,1.000000 and generate charts over unit and week (both as factors?) and think I should be using aggregate, but wanted to find out if there's a better method. Thanks, Jeff. -- Jeff D. Hamann Forest Informatics, Inc. PO Box 1421 Corvallis, Oregon 97339-1421 phone 541-754-1428 fax 541-752-0288 jeff.hamann at forestinformatics.com http://www.forestinformatics.com