Transpose long to wide in SAS

Question

I have a very large data set (18 million observations) that I would like to transpose by subsetting based on one variable and creating 900 new variables out of those sub/ets. Ex

Answer 1

Transpose steps like this are easily done with the array statement. Example for your code would be something like:

data new (keep = year var1-var3);
  set data;
  by year;
  array vars {3} var1-var3;
  retain var1-var3;
  if first.year then i=1;
  else i+1;
  vars{i} = faminc;
  if last.year then output;
run;

But I don't have SAS to double check this. Also see here.

There are no good transpose procedures in PROC SQL.Too limited.