I need help in: I need to create a variable - and keep it as missing as it is not present in my dataset. However to make it standard and if that variable comes back in future. Now i am using in the data step. data inc; set sashelp.class; mhelp=" "; run; But in the above case if my mhelp variable comes back in future then it makes it as missing which i do not want to. Any help
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