使用R将data.frame转换为简单向量

Question

我有这个data.frame:

> print(v.row)
    X1  X2  X3  X4  X5  X6  X7  X8  X9 X10 X11 X12 X13 X14 X15 X16 X17 X18 X19 X20 X21 X22 X23 X24
57 177 165 177 177 177 177 145 132 126 132 132 132 126 120 145 167 167 167 167 165 177 177 177 177
> dput(v.row)
structure(list(X1 = 177, X2 = 165, X3 = 177, X4 = 177, X5 = 177, 
    X6 = 177, X7 = 145, X8 = 132, X9 = 126, X10 = 132, X11 = 132, 
    X12 = 132, X13 = 126, X14 = 120, X15 = 145, X16 = 167, X17 = 167, 
    X18 = 167, X19 = 167, X20 = 165, X21 = 177, X22 = 177, X23 = 177, 
    X24 = 177), .Names = c("X1", "X2", "X3", "X4", "X5", "X6", 
"X7", "X8", "X9", "X10", "X11", "X12", "X13", "X14", "X15", "X16", 
"X17", "X18", "X19", "X20", "X21", "X22", "X23", "X24"), row.names = 57L, class = "data.frame")

我会删除所有行和列名称以获得简单vector.但是该as.vector功能不起作用(它返回一个data.frame).

> as.vector(v.row)
    X1  X2  X3  X4  X5  X6  X7  X8  X9 X10 X11 X12 X13 X14 X15 X16 X17 X18 X19 X20 X21 X22 X23 X24
57 177 165 177 177 177 177 145 132 126 132 132 132 126 120 145 167 167 167 167 165 177 177 177 177

Answer 1

看到 ?unlist

给定列表结构x,unlist简化它以生成包含x中出现的所有原子组件的向量.

unlist(v.row)
[1] 177 165 177 177 177 177 145 132 126 132 132 132 126 120 145 167 167 167
       167 165 177 177 177 177

编辑

你也可以这样做as.vector,但你需要提供正确的模式:

 as.vector(v.row,mode='numeric')
 [1] 177 165 177 177 177 177 145 132 126 132 132 132 126 120 145 167 167
      167 167 165 177 177 177 177