R：从字符向量中删除数字

Question

我在R中获得了下一个向量：

 vec <- c("hello","3","-52","b2b","1j","place") 

现在我要删除＆＃34; 3＆＃34;和＆＃34; -52＆＃34;，但我不想删除＆＃34; b2b＆＃34;和＆＃34; 1j＆＃34;。

我可以在代码中添加什么来删除像＆＃34; 40＆＃34;在以下向量中：

vec2 <- c("hello","3","-52","b2b","1j","place 40") 

Answer 1

假设你的载体是：

 vec1 <- c("hello", "3", "-52", "b25b", "+22", "1j5", "place", "32.50")
 gsub("^[-+]?[0-9.]+$", " ", vec1)
 #[1] "hello" " "     " "     "b25b"  " "     "1j5"   "place" " " 

也适用于vec

 gsub("^[-+]?[0-9.]+$", " ", vec)
 #[1] "hello" " "     " "     "b2b"   "1j"    "place"