I have a data set below. I want to format all categorical variables that have numbers (variables starting with "i" are all indicators (1="yes" and 0="no")). The picture below only shows six of those variables (idem, ipsychrx, icnsrx, incoven, iatypical and ibenzo). But I have 47 of them in total. How to I format them without necessarily creating proc format for each variable? And how do I create a new four level variable type from the variables 'iconven' and 'iatypical' that have values 0="neither", 1="conventional", 2="atypical only", 3="both"?
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