Sorry, but we still need a reproducible example. There's a lot of important details behind variables in R. To help you, we need a chunk of code we can run to recreate the problem.
Also, code is easier to read when you use the forum's formatting markup.
Specifically, you can show blocks of code by starting and ending with a line of three backticks:
```
dat <- dat[with(dat, !((e>0)&(e<270))), ]
```