st: -lowess- does not respect the cols() or rows() suboption when used with by()

["Eva Poen" <lexep2@nottingham.ac.uk>]

Dear all,

both in Stata 9.2 and 8.2, the -lowess- command does not respect the
rows() or cols() suboption to by():

-lowess price mpg, by(foreign, cols(1))-

produces two columns instead of one, whereas

-scatter price mpg, by(foreign, cols(1))-

behaves as expected. Am I overlooking something very obvious here? The
help file for -lowess- states that twoway options may be applied,
including by() suboptions.

Thanks,
Eva
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