Help with histograms

The iPlots package provides interactive graphics.  One way to to what  
you want to do would be to create a variable with all values and a  
second binary variable recording which are the 16 special cases.   
Draw an interactive histogram of the first with ihist and an  
interactive barchart of the second with ibar.  Then click on the bar  
for the 16 special cases.

Antony