Can someone please give me an example of how to replace AppendColumn with whatever it is replaced with.  I looked at the documentation for both FlattenArray and Join but did not see anything concerning AppendColumns.  My attempt to use the AppendRows example didn't work (i.e. 
http://reference.wolfram.com/mathematica/Compatibility/tutorial/LinearAlgebra/Files/MatrixManipulation.en/legacy_1.gif )

In my above attempt I am just guessing that the problem was related to some simple list manipulation rule.  I am a statistician and have been using SAS & R for many years so  my brain thinks all math software processes a matrix of information row-wise.

Thanks,

Steve