如何根据字符串的字符数或长度从字符串向量中删除元素?
df <- c("asdf","fweafewwf","af","","","aewfawefwef","awefWEfawefawef")
> df
[1] "asdf" "fweafewwf" "af" "" "" "aewfawefwef" "awefWEfawefawef"
例如,我想要删除所有长度小于5的
df
元素,那么输出结果应该是:> df
[1]"fweafewwf" "aewfawefwef" "awefWEfawefawef"
谢谢!