I have a SAS dataset as follows
ID main_city city1 city2 city3 city4
123 Newyork Dallas Chicago SF Atlanta
234 Dallas Chicago Newyork Dallas Atlanta
345 Chicago Newyork Atlanta Austin Boston
456 Denver Denver Baltimore Miami Chicago
I want a field called city in the output which should have the value of null if none of city1-city4 matches with main city but will have the value of main city if it matches with any of the values of city1-city4.The example output should be as follows.
ID City Value1 Value2 Value3 Value4
123 Dallas Chicago SF Atlanta
234 Dallas Chicago Newyork Dallas Atlanta
345 Newyork Atlanta Austin Boston
456 Denver Denver Baltimore Miami Chicago
data want;
set have;
array t(*) city1-city4;
if main_city in t then city=main_city;
run;
Like this?
city=ifc(whichc(main_city, of city1-city4), main_city, ' ');
data want;
set have;
array t(*) city1-city4;
if main_city in t then city=main_city;
run;
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