Re: Plot colour issue - Strange change of shade

[Markus Mützel]

Am 11. März 2020 um 14:03 Uhr schrieb "steve wood":
> > Hi all,
> >
> > My apologies if my issue is due to my inexperience and is a simple fix but
> > I
> > only started using Octave (or any software of the type) yesterday.
> >
> > The colour in my graph appears strange and seems to have different shades
> > or
> > go greyish (see image). I just want it to be the same shade of dark green
> > all along. Is there too many datapoints or something like that ?
> >
> >>> plot(x, y, "color", [0, 0.45, 0], "linewidth", 3);
> >
> > Many thanks,
> >
> >
> > <https://octave.1599824.n4.nabble.com/file/t373672/Octave_Graph.png>
> >
> 
> 
> Hi again,
> 
> I did further research and it appear that other users encountered the same
> issue when plotting a graph using a very large assay. As an example if I
> plot:
> 
> plot(sin((1:550000)*2*pi/550000), "color", [0,0.45,0], "linewidth", 4)
> 
> The curves fades where a lot of points are close to each other, in my first
> example the curve is darker where there are less points close to each other.
> 
> Any idea how this can be fixed ?

This might be an issue of the graphics driver. Which OS? Which version of 
Octave?

Markus