Re: [Gnuplot-info] Short horizontal line become exaggerated in saved plots

[Hans-Bernhard B. <HBB...@t-...>]

Am 14.04.2015 um 01:40 schrieb Rob Sargent:
> Hoping third times the charm, with this posting.  My first was rejected
> as not-a-member, the second seems to have simply wafted away...
>
> I'm running gnuplot 4.2 patchlevel 6 on RHEL 6.6.

Well, that version is old: 5.5 years.  So the first and foremost 
suggestion must be: update to something at least remotely current, like 
4.6 pl 6, or even 5.0

> I draw a number of (usually quite short) lines 4pt thick throughout the
> plot. In the interactive window these are so short they are often barely
> visible (and that's a good thing). But they become exaggerated in the
> (viewing of) the saved plot, using jpeg, png or gif.

Well, what do you expect a discrete, pixel-based terminal to do? You 
didn't even reveal how big you make those images...

> each of them is plotted from a generated file of this form:
>
>      1    23057190    2.709457    0.000000    23057190
>      1    24552835    2.709457    0.000000    24552835

That's a line covering just 1/2000th of your x axis range.  That leaves 
a normal-sized pixel image only one of two choices: display nothing at 
all, or display at least one pixel.  Neither of which you appear to 
want.  So what did you expect to happen?