gtools ::混合订单会改变我的数据框架

Question

data = data.frame(v1 = c(2,"10+",3,4,5,6,7,8,9), v2 = c(15,30,12,59,44,24,67,19,35))
    data$v1
    [1] 2   10+ 3   4   5   6   7   8   9  
    Levels: 10+ 2 3 4 5 6 7 8 9
    mixedorder(data$v1)
    [1] 2 1 3 4 5 6 7 8 9

注意" 10 "变为" 1"。那是怎么回事？

Answer 1

使用这样的正则删除所有非数字字符：

data[order(as.numeric(gsub("[^[:digit:]]+", "", data$v1))),]
#   v1 v2
#1   2 15
#3   3 12
#4   4 59
#5   5 44
#6   6 24
#7   7 67
#8   8 19
#9   9 35
#2 10+ 30