dear all,
stata 8.2 xp pro,
i have a var like this:
monopolar
bipolar
bipolar
bipolar
monopolar
nodiathrm
diathermy[2]
diathermy[2]
bipolar
monopolar
diathermy[2]
diathermy[2]
.
. <- denotes missing
.
monopolar
diathermy[2]
diathermy[2]
.
.
what i want to achieve is for every first encountered diathermy[2] to be changed to diathermy[1], while leaving the second occurence as diathermy[2]. is this possible in stata? if it can be done, would appreciate advice/help on how to achieve it.
thank you,
bw
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