how to group a parameter in Proc report

[HitmonTran]

Hi 

I need to output proc report by dose group 1 and group 2. Can someone give me a general idea on how to do so:

want (see highlight):

[data_null__]

Use by-variable directivies in TITLE statement(s).  You will also need a BY statement.

Title5 j=l "#byval1";

[SASKiwi]

This example in the documentation looks like one possible approach: Report Example