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From: Michael Okuntsov <proximum@land.ru>
Newsgroups: comp.graphics.apps.gnuplot
Subject: Convert timestamp to elapsed time
Date: Thu, 25 Sep 2014 14:02:49 +0700
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Hello,

how to convert timestamp values like

2014-09-25_14:01:23.576

to number of seconds since the first value in file?