Gnuplot: arc circles with no line

Question

I am trying to plot an arc segment using Gnuplot this circle command:

set obj 1 circle at 9 size 3 arc [0:180] fc rgb "blue" lw 1

And I'm getting

But I would like to get

Is there a simple way to do that? Or do I need to draw the arc and then "erase" the part I don't need?

Answer 1

Just for the records. Actually, since gnuplot 5.0.0 (Jan. 2015) there seems to be the option {no{wedge}}, however, not documented in help circle. It seems to appear the first time in help circle in gnuplot 5.2.7 (May 2019).

Script: (works with gnuplot>=5.0.0, Jan. 2015)

### circle/arc object with/without wedge
reset session

set obj 1 circle at -4,60  size 3 arc [0:180] fc "red"
set obj 2 circle at  4,60  size 3 arc [0:180] fc "web-green" nowedge

plot x**2
### end of script

Result: