Here is provided an example of line breaking in a plot drawn with Gnuplot.
Using arrows, as suggested in the link above, the results depend by the axis, i.e. I can't handle the angle of the arrow with simplicity. The following figure shows an example of an ugly line breaking obtained by the example in the link above.
To obtain that ugly arrows, I did something like:
x1 = 32
yb = 0
yt = 100
tiny=2
set arrow 1 from x1-tiny, yb-tiny to x1+tiny, yb+tiny nohead
set arrow 2 from x1-tiny, yt-tiny to x1+tiny, yt+tiny nohead
for the first plot and:
x2 = 33
set arrow 1 from x2-tiny, yb-tiny to x2+tiny, yb+tiny nohead
set arrow 2 from x2-tiny, yt-tiny to x2+tiny, yt+tiny nohead
for the second.
Hence, instead of using arrows, I wish to use a symbol to be put at the end of the axis. A symbol is in pt and doesn't change with the axis length. I think it should be done by putting a label centered into a specific point.
Which is the code to do that in Gnuplot?
