JSL, delete a column if there's only 1 'group', labeled in another column?
Curious about this. I've got a dt with several thousand columns that I'm scripting some cleansing for further analysis. The data set is process data, where each row is a unique process run from a given machine. Some machines don't report out all the full list of sensors, so I'm stuck with a few hundred columns only coming from a single machine. I'd like to purge these, as I can't do any statistica...