Re: compare time date.

Hallo all.

Thanx Hans-Bernhard for your answer.

Hans-Bernhard Br=F6ker wrote:
> I suspect you'll need the development version for that.  You'll need at
> least the new functionalities of strptime() and string expressions. I'm
> not even sure it can be done with those:

I use gnuplot version 4.2 patchlevel 2.

> > plot 'dat.txt' u 2 : ( $2 >=3D "20080524 22:00:00" && $2 <=3D
"20080526
> > 02:00:00" ? $1/10 : 1/0 ) t '' ps 0.4 pt 1 lt 2
>
> Timefmt data and extended 'using' specifications don't work particularly
> well together.
>
> > as I understand gnuplot approximate date to nearest date.
>
> You understood that incorrectly.  gnuplot handles dates and times in
> seconds.

I can solve my problem in next way:

plot 'dat.txt' u 2 : ( (timecolumn(2)+946684800) >=3D `date +%s -u -d
"20080524 22:00:00"` && (timecolumn(2)+946684800) <=3D `date +%s -u -d
"20080526 02:00:00"` ? $1/10 : 1/0 ) t '' ps 0.4 pt 1 lt 2

Where:
$ date -u -d "2000-01-01 00:00:00" +%s
$ 946684800
$ date -u -d "1970-01-01 00:00:00" +%s
$ 0

So, I there is two solutions, one - development version of gnuplot (I
not check it) and another - which I find.
Anyone have other ideas?

Thanx.