Re: delete columns csv file

Hermann Peifer wrote:

> Couldn't: if ($i"" != "0.0e0") be replaced by a simple: if ($i)  ?

I don't think so, because we are not content with just knowing that the
string is nonempty (what "if ($i)" does), but we want to check that the
string has indeed a value different from "0.0e0".
Yes, "0.0e0" may mean "empty" to the OP, but not to awk.

> And I wasn't sure what the first pair of double quotes in this condition
> was meant to do?

This is one I'm interested in too.

-- 
All the commands are tested with bash and GNU tools, so they may use
nonstandard features. I try to mention when something is nonstandard (if
I'm aware of that), but I may miss something. Corrections are welcome.