i have 3 variables called v1d, v2d, v3d which all equal to .
moreover i have 3 variables a1, a2, a3 which equal to . or some numerical value
i want
replace v1d = 1 if a1 ~=.
replace v2d = 1 if a2 ~=.
replace v3d = 1 if a3 ~=.
how can i do this in 1 command? with forvalue?
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