Re: [Gnuplot-info] drawing an arc on a parametric plot

[Thomas S. <t.s...@fz...>]

draw the arc as a function:

set parametric
set xrange [-1.1:1.1]
set yrange [-1.1:1.1]
set trange [0:1]
set size square

deg2rad(x)=x/180.*pi

set arrow 1 from
0.5*sin(deg2rad(45.+90.))+0.001,0.5*cos(deg2rad(45.+90.))+0.001 \
to 0.5*sin(deg2rad(45.+90.))-0.001,0.5*cos(deg2rad(45.+90.))-0.001 size
0.1,10

#1st we draw a full circle, then an arc from 45° to 45°+90°

plot sin(2.*pi*t),cos(2.*pi*t), \
0.5*sin(t*deg2rad(90.)+deg2rad(45.)),0.5*cos(t*deg2rad(90.)+deg2rad(45.))


Tim23 wrote:
> 
> I am trying to draw an arc (preferably with an arrow at the end) on a
> parametric plot.
> The trick 
> http://old.nabble.com/Re%3A-Gnuplot---changing-ranges-on-replot-%28polar-coordinates%29--p28487719.html
> seems to work on a polar plot, but not on parametric.
> Are there other options?
> 
> 

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