Plotting dashed line

Question

How to plot a dashed grey line using gnuplot? set style line 1 lt 2 lc rgb "grey" lw 1

I tried:

plot "-" using 1:2, \
     "-" using 1:2, \
     "-" using 1:2 ls 1,\
     "-" using 1:2 ls 1
1.5 17
1.7 16
e
1.5 10
1.7 8
e
1.5 0
1.5 20
e
7 0
7 20
e

There should be two vertical dashed grey lines, but there are actually only the points.

The command `test` is a nice way to see exactly how your current terminal is behaving. — mgilson, Mar 12 '13 at 12:08

Thor · Accepted Answer · 2013-03-12T11:14:02.940

2

To have the plot command default to with lines, you need set style data lines. You have to specify termoption dashed to get dashed lines, but that also means that linetype 2 and up are dashed or dotted. I think defining the appropriate line styles is the best approach:

set termoption dashed

set style data lines
set style line 1 lt 2 lc rgb "grey" lw 1
set style line 2 lt 1 lc 1 lw 1
set style line 3 lt 1 lc 2 lw 1

plot "-" using 1:2 ls 2, \
     "-" using 1:2 ls 3, \
     "-" using 1:2 ls 1, \
     "-" using 1:2 ls 1
1.5 17
1.7 16
e
1.5 10
1.7 8
e
1.5 0
1.5 20
e
7 0
7 20
e

edited Mar 12 '13 at 11:14

answered Mar 12 '13 at 09:25

Thor

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Another issue was, that dashed lines don't work with the `png` backend. I had to change to `set terminal pngcairo` – Razer Mar 12 '13 at 09:59

Plotting dashed line

1 Answers1