Em 16 de dezembro Henrique Andrade <henrique.coelho@gmail.com> escreveu:

Em 16 de dezembro de 2010 Laurent Schuermans <laurent.schuermans@gmail.com>:


Dear all,
 
In econometric classen, we use gretl along with the Principles of Econometrics handbook. Now we have to write a paper and do research about a subject of own interest while using gretl.
 
The problem however is that I don't know how to recode variables in gretl. I have a bunch of dichotomious variables with categories 1 and 2 that I want to recode to 0 and 1, which is easier for interpretation, but I don't know how to do this.
 
Can somebody help me out?

Dear Laurent, suppose you have two series, "variable1", with the values "2", and "variable2", with values "1". I think you could try this:

<script>
series variable1 = variable1 - 1
series variable2 = variable2 - 1
</script>


I'd made a mistake :-( Let me try to correct it. Supose you have a variable that assumes only 2 and 1 as values. So now you can try this:

<script>
series variable = variable - 1
</script>

In that you way all your 2 will become 1 (because 2-1=1) and all your 1 will become 0 (because 1-1=0). You can try my suggestion, but the Ignacio's suggestion is much more elegant ;-)

Best regards,
--
Henrique C. de Andrade
Doutorando em Economia Aplicada
Universidade Federal do Rio Grande do Sul
www.ufrgs.br/ppge