Yes, I tend to use a free HexEdit program, you can grab a portable (i.e. non-install) one free off the web and they are very useful for looking at the real underlying codes. http://www.nielshorn.net/prog/old/hexed/ Is the one I use. ... View more

You're right @PhilC. I've turned to proc sql myself in similar situations, which works well if you have a few variables. Proc SQL requires a format statement for each variable, whereas if the format statement worked in proc means, you could do something like this, for example: format var1-varN comma12.; So the benefit of having a format statement in proc means would be if you had multiple variables that you wanted to apply the same format to, you could save some typing. ... View more

Just to give you one example, suppose products 3, 28, and 30 have the highest 3-way frequency.  Then the 2-way combination of products 3 and 28 must have at least as high a frequency (same for the combination of products 3 and 30, and products 28 and 30). ... View more