使用字符串向量按行粘贴字符串矩阵

Question

我正在尝试将 multcompView 个字母与摘要数据连接成一个矩阵。我在各个汇总矩阵单元格中使用 for loop 到运行，并将它们与各自的字母连接起来。我快到了，但我的矩阵同时输出原始数据和粘贴数据（见下文）。

函数：

for (i in 1:nrow(X1))
  tableRow = matrix(c(tableRow,paste(tableRow[i],letters$Letters[i],sep = "")),nrow = 1)

其中： X1是我的总结table，tableRow是X1的第一行，还有 letters 包含我要连接的字母。

Returns:

[1,] "5.53 ± 0.77" "6.72 ± 1.18" "5.12 ± 0.44"
 "5.24 ± 0.41" "5.53 ± 0.77a" "6.72 ± 1.18a" "5.12 ± 0.44a" "5.24 ± 0.41a"

期望的输出：

[1,]  "5.53 ± 0.77a" "6.72 ± 1.18a" "5.12 ± 0.44a" "5.24 ± 0.41a"

Answer 1

这将完成所有工作：

## example matrix
set.seed(0); X <- round(matrix(runif(12), nrow = 4, ncol = 3), 2)

#      [,1] [,2] [,3]
# [1,] 0.90 0.91 0.66
# [2,] 0.27 0.20 0.63
# [3,] 0.37 0.90 0.06
# [4,] 0.57 0.94 0.21

matrix(paste0(X, letters[1:4]), nrow = nrow(X))

#      [,1]    [,2]    [,3]   
# [1,] "0.9a"  "0.91a" "0.66a"
# [2,] "0.27b" "0.2b"  "0.63b"
# [3,] "0.37c" "0.9c"  "0.06c"
# [4,] "0.57d" "0.94d" "0.21d"

对于您的数据，您可以这样做：

matrix(paste0(X1, letters$Letters), nrow = nrow(X1))

备注1

我这里的例子有一些缺陷。您已经将 X1 作为字符矩阵，而我的示例 X 是数字。当做paste0()时，数值0.90变成"0.9"（因为as.character(0.90)给出"0.9"）。对于你的数据，不会有这样的行为。

备注2

哦，我居然找到了避免这种行为的方法。

X <- format(X)

#      [,1]   [,2]   [,3]  
# [1,] "0.90" "0.91" "0.66"
# [2,] "0.27" "0.20" "0.63"
# [3,] "0.37" "0.90" "0.06"
# [4,] "0.57" "0.94" "0.21"

然后做paste0()就可以了：

#      [,1]    [,2]    [,3]   
# [1,] "0.90a" "0.91a" "0.66a"
# [2,] "0.27b" "0.20b" "0.63b"
# [3,] "0.37c" "0.90c" "0.06c"
# [4,] "0.57d" "0.94d" "0.21d"

使用字符串向量按行粘贴字符串矩阵

Pasting a string matrix row-wise with a string vector

for-loop

r

matrix

paste