I might not be the first to do this, but why keep it to myself?
In addition to the way mentioned in the extended features doc
one can also use the dcolumn package to have decimal alignment in tables.
In the LateX preamble I added:
\usepackage{dcolumn}
\newcolumntype{d}[1]{D{.}{.}{#1}}
To have a column decimally aligned I enter in the
`special column alignment' box of the `Table extra' form the following:
d{number of decimals of my data}
Lazy as I am, I usually add a decimal or 2 to create some extra
columnspace.
So if I have data with three decimals I enter
d{4}
3 for the decimals, 1 for the columnspace.
Setting the multicolumn attribute for a single cell makes it insensitive
to the decimal alignment which comes in handy as well.
It works for me.
Cheers, Ed.
