st: na.omit synonym

["bunny , lautloscrew.com" <bunny@lautloscrew.com>]

HI everybody,

i have several non-response in my dataset that are coded -1 .
i�d like to drop any observation (row) where one or more columns  
contains a -1.

In R there's na.omit to the job. is there a similiar syntax in stata ?

thx in advance

matthias
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