选择Column1为字母数字的行

Question

我还需要Count> 0的行。我可以在一个单独的步骤中完成，但我很好奇我是否可以一步完成这两个条件。

我想删除这2条记录？和_来自我的结果集。

Type = c("alpha","bravo","charlie","?","_", "delta")
 Count = c(1,2,3,4,5,0) 
 Desc = c("aaa","bbb","ccc","ddd","ccc", "ddd") 
 df = data.frame(Desc, Type,Count)       # df is a data frame

 df[df$Type %in% [a:z],]   ##  this doesn't work

Answer 1

你可以尝试

df[grep('[A-Za-z]+', df$Type),]

或者

df[grep('^[^[:punct:]]+$', df$Type),]