缺失值

处理方法:

  • 直接删除
  • 使用均值代替

查看:

  1. > Missing.map(a1)
  2. Legend: '_' no, ':' some, '!' all
  3. var missing.map total percent
  4. 1 mpg ________________________________ 0 0
  5. 2 cyl __!!!!!!!!______________________ 8 25
  6. 3 disp ________________________________ 0 0
  7. 4 hp ________________________________ 0 0
  8. 5 drat ________________________________ 0 0
  9. 6 wt ________________________________ 0 0
  10. 7 qsec ________________________________ 0 0
  11. 8 vs ________________________________ 0 0
  12. 9 am ________________________________ 0 0
  13. 10 gear ________________________________ 0 0
  14. 11 carb ________________________________ 0 0

异常值

使用箱线图检验使用Str 检查。