R：从charachter向量中删除数字

我得到了R中的下一个向量：

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

现在我想删除3和-52，但我不想删除b2b和1j

我可以在代码中添加什么来删除以下向量中的数字，如40：

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

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假设你的向量是：

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

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vec[is.nasuppressWarningsas.numericvec]vec[grep^[-]*[：digit:]+$，vec，invert=TRUE]vec[grep[a-z]+，vec]它工作了！谢谢甚至有可能用？gsub^[0-9-]+$，vec替换这些数字吗

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