Plotting vertical line on plot

[Julia Bell]

Using gnuplot 3.7

I can plot a horizontal line on a 2-d plot using a command of the form
plot [0:10] 20 notitle with line 1
(where the x axis ranges from 0 to 10, and I want the line placed at a
yaxis value of 20).

But, I can't find a way to plot a vertical bar:
plot 0 [10:20] notitle with line 1
doesn't work.

I understand this mathematically is a multi-valued quantity, not a
function, so maybe that's why it doesn't work.

Is there any way to do this other than creating a datafile as
0 10
0 20
and plotting the file?

Thanks,

Julia Bell

[Hans-Bernhard Broeker]

Julia Bell <julia...@jpl.nasa.gov> wrote:

> But, I can't find a way to plot a vertical bar:
> plot 0 [10:20] notitle with line 1
> doesn't work.

But

set parametric
plot [10:20] 0, t notitle w l 1

would.

Or you could add it to an existing plot like this:

set arrow from 0,10 to 0,20 nohead

--
Hans-Bernhard Broeker (bro...@physik.rwth-aachen.de)
Even if all the snow were burnt, ashes would remain.

[Georg Wittig]

Julia Bell <julia...@jpl.nasa.gov> writes:

>But, I can't find a way to plot a vertical bar:
>plot 0 [10:20] notitle with line 1
>doesn't work.

gnuplot> plot '-' w l 1
0 10
0 20
e
gnuplot>

--
Georg Wittig, FhG Georg....@gmd.de
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Math problems? Call 1-800-[(10x)(13i)^2]-[sin(xy)/2.362x]