2011-10-27 任意の底の対数 SAS proc fcmp outlib = sasuser.funcs.logbase; function logbase(x, base); return (log(x) / log(base)); endsub; run; options cmplib = sasuser.funcs; data test; a = logbase(48, 7); b = logbase(49, 7); proc print; run;OBS a b 1 1.98940 2