CODE DESIGN, MACROS, AND SUBROUTINES

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EXAMPLE: CPI MACRO*** Adjust earnings for inflation ***;libname dot “.”;%macro cpi;array cpi{2010:2013} _TEMPORARY_;if _N_=1 then do;cpi{2010}=.8;cpi{2011}=.9;cpi{2012}=.95;cpi{2013}=1.2;end;%mend;data temp1;set dot.inputs;%cpi;earn_adj=earn*(cpi{2010}/cpi{year});run;Wednesday, August 21, 13
BAD EXAMPLE: CPI*** Adjust earnings for inflation ***;libname dot “.”;%macro cpi;data temp1;set dot.inputs;array cpi{2010:2013} _TEMPORARY_;if _N_=1 then do;cpi{2010}=.8;cpi{2011}=.9;cpi{2012}=.95;cpi{2013}=1.2;end;earn_adj=earn*(cpi{2010}/cpi{year});run;%mend;Wednesday, August 21, 13
Page 2 and 3: CODE DESIGNDo not simply start writ
Page 4 and 5: CODE STYLEMake your code as transpa
Page 6 and 7: REWRITE 1*** Use the data created i
Page 8 and 9: REWRITE 3*** Use the data created i
Page 10 and 11: SIMPLE EXAMPLESAS%let rhs_vars=x1 x
Page 12 and 13: WHY USE SUBROUTINES?Using a code li
Page 16 and 17: STATALinks to web tutorialshttp://w
Page 18: CONCLUSIONWrite code with a consist

CODE DESIGN, MACROS, AND SUBROUTINES

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