If you were looking up something Stata-related and Google sent you here, you may or may not be in the right place. What I know for sure is that you should definitely join the Statalist. I've benefited lots over the years from lurking there. Here's the latest example: somebody asked yesterday about an easy way to [...]

I came across a data set with some variables in it that recorded actual measurements, so their values could be zero or higher. Then a need arose to quickly look up how many of these variables would have recorded anything -- in effect, separating the yes/no part from the how much -- and adding the [...]