> Dear statalisters,
>
> I wonder whether it is possible to drop several variables in a dataset
> specifying an "if" condition. For instance, it would be interesting
> being able to drop all variables in the dataset for which all cases
> are 0 or missing values. I have been reading the help documentation on
> the "drop" command, however I am unable to find the right answer so
> far. Note that I want to drop variables and not cases.
>
> Thanks in advance.
>
> Guillermo
>
>
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