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calling a macro from a data step

calling a macro from a data step

calling a macro from a data step

I'm trying to create a field in a datasets based in the value of another field.
I'm usind a macro to make se assignment of the value. Yo can see the process bellow.
The real macro is not that simplem but I'ms using it to make tests.

I expect that result:

campo1 campo2
ab 1
ac 2

but I get:

campo1 campo2
ab 1
ac 2

I'm not sure if I have any error in the method of calling a macro from a data sets

Can anybodt hepl me???, any advice would n greatly apreciatted.


data prueba;
length campo1 $10.;
campo1 = 'ab';
campo1 = 'ac';

data prueba1;
set prueba;
campo2 = %valor1(campo1);

%macro valor1(campo);
%if %trim(&campo) = 'ab' %then %do;
%let salida = 1;
%else %do;
%let salida = 2;

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