>>>Why not...
>>>
>>>

>>>use trial
>>>go top
>>>scan
>>>do case
>>>    case trial.min_sex = 'F'
>>>        replace min_f with .t.
>>>        replace min_m with .f.
>>>
>>>    case trial.min_sex = 'M'
>>>        replace min_f with .t.
>>>        replace min_m = .f.
>>>endcase
>>>endscan
>>>

>>
>>even better...
>>
>>repl all min_f with .T. for min_sex = 'F'
>>repl all min_m with .T. for min_sex = 'M'
>
>REPL ALL MIN_F WITH MIN_sex = 'F', MIN_M WITH MIN_SEX = 'M'

Cool... I didn't know you could do that.