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法律研究如何在R語言中分離字串和數值？
為了分離字串和數值，我們可以使用`strsplit`函式，透過傳遞所有型別的字元和所有數值來分割值。例如，如果我們有一個名為`df`的資料框，其中包含一個名為`Var`的字元列，該列包含連線的字串和數值，那麼我們可以使用以下命令來分割它們：
strsplit(df$Var,split="(?<=[a-zA-Z])\s*(?=[0-9])",perl=TRUE)
示例
考慮以下資料框：
x<-sample(c("india 123","china 232","sudan143","russia326 2"),20,replace=TRUE)
df1<-data.frame(x)
df1輸出
x 1 sudan143 2 china 232 3 russia326 2 4 sudan143 5 sudan143 6 china 232 7 china 232 8 india 123 9 sudan143 10 china 232 11 india 123 12 russia326 2 13 sudan143 14 russia326 2 15 china 232 16 india 123 17 sudan143 18 india 123 19 china 232 20 china 232
分割`df1`的x列中的字串和數值：
示例
strsplit(df1$x,split="(?<=[a-zA-Z])\s*(?=[0-9])",perl=TRUE)
輸出
[[1]] [1] "sudan" "143" [[2]] [1] "china" "232" [[3]] [1] "russia" "326 2" [[4]] [1] "sudan" "143" [[5]] [1] "sudan" "143" [[6]] [1] "china" "232" [[7]] [1] "china" "232" [[8]] [1] "india" "123" [[9]] [1] "sudan" "143" [[10]] [1] "china" "232" [[11]] [1] "india" "123" [[12]] [1] "russia" "326 2" [[13]] [1] "sudan" "143" [[14]] [1] "russia" "326 2" [[15]] [1] "china" "232" [[16]] [1] "india" "123" [[17]] [1] "sudan" "143" [[18]] [1] "india" "123" [[19]] [1] "china" "232" [[20]] [1] "china" "232"
示例
y<-sample(c("orange 12","banana247","guava 235","kiwi 138"),20,replace=TRUE)
df2<-data.frame(y)
df2輸出
y 1 banana247 2 kiwi 138 3 banana247 4 orange 12 5 kiwi 138 6 kiwi 138 7 banana247 8 banana247 9 orange 12 10 guava 235 11 guava 235 12 banana247 13 guava 235 14 orange 12 15 banana247 16 kiwi 138 17 kiwi 138 18 banana247 19 banana247 20 orange 12
分割`df2`的y列中的字串和數值：
示例
strsplit(df2$y,split="(?<=[a-zA-Z])\s*(?=[0-9])",perl=TRUE)
輸出
[[1]] [1] "banana" "247" [[2]] [1] "kiwi" "138" [[3]] [1] "banana" "247" [[4]] [1] "orange" "12" [[5]] [1] "kiwi" "138" [[6]] [1] "kiwi" "138" [[7]] [1] "banana" "247" [[8]] [1] "banana" "247" [[9]] [1] "orange" "12" [[10]] [1] "guava" "235" [[11]] [1] "guava" "235" [[12]] [1] "banana" "247" [[13]] [1] "guava" "235" [[14]] [1] "orange" "12" [[15]] [1] "banana" "247" [[16]] [1] "kiwi" "138" [[17]] [1] "kiwi" "138" [[18]] [1] "banana" "247" [[19]] [1] "banana" "247" [[20]] [1] "orange" "12"
更新於：2021年3月17日
950 次瀏覽
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