Question

我的代码如下

    got = read.csv("battles.csv")
    got = got[!(is.na(got$attacker_king) | got$attacker_king==""), ]
    got = got[!(is.na(got$region) | got$region == ""), ]

变量缺少值，但使用上面的代码将其删除

    spiderR = table(got$attacker_king, got$region)
    spiderR

当我尝试运行上面的代码时，它会显示：

                           Beyond the Wall The Crownlands The North The Reach The Riverlands
                                         0              0         0         0              0
  Balon/Euron Greyjoy                    0              0         5         2              0
  Joffrey/Tommen Baratheon               0              0         2         0              9
  Robb Stark                             0              1         1         0              6
  Stannis Baratheon                      1              1         2         0              0

                           The Stormlands The Westerlands
                                        0               0
  Balon/Euron Greyjoy                   0               0
  Joffrey/Tommen Baratheon              2               1
  Robb Stark                            0               2
  Stannis Baratheon                     1               0

为什么第一行有零？

Answer 1

如果在levels(got$attacker_king)中您有一个非预期的因素，您可以获取got表的一部分并再次运行您的代码。那就是：

     # Define the subset of interest 
       subset.got <- got[got$attacker_king!="",]
     # Redefine the factor
       subset.got$attacker_king <- factor(subset.got$attacker_king)
     # Run just what you did before
       spideR <- table(subset.got$attacker_king, subset.got$region)
       spideR

如何删除表中可疑的零行？

1 个答案: