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From: sfeam <sfeam@users.sourceforge.net>
Newsgroups: comp.graphics.apps.gnuplot
Subject: Re: laplace transformation half - plane
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Date: Mon, 02 Jan 2012 09:20:56 -0800
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Nikolaus Huber wrote:

> hello, at the moment I'm writing a special topic for my final exams in
> mathematics, my topic is laplace - transformation. Thus I have to plot
> a graph, that displays socalled half planes, which means that there
> are just the axes and than, from a specific x value on (e.g. x = 0),
> the complete right coordinate system should be shaded. I've tried to
> define 2 lines parallel to the y axis and fill the space between them,
> but actually that didn't work.
> 
> Thanks for all suggestions!
> 
> niki

# gray background for right half-plane
set object 1 rectangle from  first 0, screen 0 to screen 1, screen 1
set object 1 behind 
set object 1 fillstyle solid noborder fillcolor rgb "gray" 

# "just the axes"
set xzeroaxis
set yzeroaxis
set border 0

# if you want to label the axes
set xtics axis
set ytics axis