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法律研究如何在R语言中分离字符串和数值？
为了分离字符串和数值，我们可以使用`strsplit`函数，通过传递所有类型的字符和所有数值来分割值。例如，如果我们有一个名为`df`的数据框，其中包含一个名为`Var`的字符列，该列包含连接的字符串和数值，那么我们可以使用以下命令来分割它们：
strsplit(df$Var,split="(?<=[a-zA-Z])\s*(?=[0-9])",perl=TRUE)
示例
考虑以下数据框：
x<-sample(c("india 123","china 232","sudan143","russia326 2"),20,replace=TRUE)
df1<-data.frame(x)
df1输出
x 1 sudan143 2 china 232 3 russia326 2 4 sudan143 5 sudan143 6 china 232 7 china 232 8 india 123 9 sudan143 10 china 232 11 india 123 12 russia326 2 13 sudan143 14 russia326 2 15 china 232 16 india 123 17 sudan143 18 india 123 19 china 232 20 china 232
分割`df1`的x列中的字符串和数值：
示例
strsplit(df1$x,split="(?<=[a-zA-Z])\s*(?=[0-9])",perl=TRUE)
输出
[[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输出
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列中的字符串和数值：
示例
strsplit(df2$y,split="(?<=[a-zA-Z])\s*(?=[0-9])",perl=TRUE)
输出
[[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"
更新于：2021年3月17日
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