数据分析师 - Week12

SAS技术

1. 选择连续的多个column

data test;
  set dataset(keep= a -- d);
run;

2. 判断除数是否为零

data test;
  length c 8.;
  set datset;
  if b ^= 0 then c=a/b;
  else c=.;
run;