zhangyu05@GMAIL.COM wrote anew: >I had a set of data from two different day. in each day, we applied three >different drug dosage to three group of patients. Now, I know how to plot >the bar chart for each day in SAS. But I have no clue how to put >them in a single chart with space between different day?

It sounds like you want to combine the data into a single VBAR or HBAR chart using the GROUP= option to define the grouping variable, which in your case would be the variable which defines the DAY of your test. If you specify SPACE=0 then there is no spacing in between bars *within* each group, but the spacing *between* groups is controlled by the GSPACE= option. So just specify GSPACE=2 or whatever you need to get the desired appearance.

HTH, David -- David L. Cassell mathematical statistician Design Pathways 3115 NW Norwood Pl. Corvallis OR 97330

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