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From: bryan <bryanlepore@gmail.com>
Newsgroups: comp.graphics.apps.gnuplot
Subject: Re: missing date in input file
Date: Wed, 21 Mar 2012 07:01:00 -0700 (PDT)
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On Wednesday, March 21, 2012 4:53:51 AM UTC-4, Frank Ursel wrote:
> 2012-01-01 10
> 2012-01-02 5
> 2012-01-05 15
> 
> I would like to see a gap (as it is "with impulses") because the two missing >days in x-axis are zero 

have you considered using a histogram? or layering different plot types?

MAYBE a ternary operator will help you skip the zeros - not sure how though. try `help ternary`.

HTH

-Bryan