How to pull the column name in to the data in SAS -

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the table date variable name respect vol, want create new variable flag if variables having 1 pull date of variable name in flag column 

  vol   31-dec-10   31-dec-11   31-dec-12   31-dec-13   31-dec-14   31-dec-15 109001  0   0   0   0   1   0 109002  0   0   1   0   0   0 109003  0   0   1   0   0   0 109004  0   0   0   1   0   0 109006  0   0   1   0   0   1

output 

 vol    31-dec-10   31-dec-11   31-dec-12   31-dec-13   31-dec-14   31-dec-15   flag 109001  0   0   0   0   1   0   31-dec-14 109002  0   0   1   0   0   0   31-dec-12 109003  0   0   1   0   0   0   31-dec-12 109004  0   0   0   1   0   0   31-dec-13 109006  0   0   1   0   0   1   31-dec-15

you want use vlabel() function since column headings don't meet standard variable name requirements , i'm assuming they're labels. below example code put in data step, you'll have know actual variable names array declaration , replace date1--date99 them.

array mydates (*) date1--date99; on mydates;     if mydates = 1 flag = vlabel(mydates); end;

the way loop written, leave date of rightmost occurrence of 1, seems consistent example in 19006 row.

see vname().


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