Please attach the full code with data. Yes, you can do what you are saying, and line up the data values below each "MIDPOINT" value for the bar chart. However, you cannot align any values with individual bars. That depends on the number of groups in each category, etc. So, you could put the string "m / n" below each midpoint, one for each group value. Compute this string for each bar and populate it in to a column and then use the BLOCKPLOT to place the string. If your data is already summarized (by category and group), you can then use SGPLOT VBARPARM to draw the cluster grouped bar chart and use a scatter plot (with markerchar) to place the values below each bar. With SGPLOT, you can probably use annotate creatively to do what you want, except there is no easy way to know (definitely) the location of each bar in the cluster, as the number of groups present in each category may vary.
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