Re: [Gnuplot-info] Plot colored surface of unit sphere

[Benjamin v. A. <ben...@gm...>]

On Thu, Feb 2, 2012 at 5:04 PM, Benjamin von Ardenne <
ben...@gm...> wrote:

> Hey guys,
>
> I am trying to plot my data on the surface of a sphere with the data
> values being color coded. For that I have tried around a lot with pm3d but
> most of the time, I got ' Warning: Single isoline (scan) is not enough for
> a pm3d plot.' errors.
>
> Now I am working with this example: http://www.gnuplotting.org/heat-maps/
>
> that I turned into my own script, that you can find at
> http://www.plotshare.com/index.ws/plot/986805525 .
>
> The data is stored as
>
> phi theta r value
>
> with r=1 constant.  I want to have a nice smooth surface like I would get
> in the 2D case using splot ...image!
>
> On plotshare, despite 'w pm3d' the points are just very small pixels and
> on my machine in wxt terminal, I do not see any of the data at all.
>
> If you have done something like that before, it would be great if you
> could help me out.
>
> Cheers,
> Ben
>
>
>
I have actually figured it out on my own already and just wanted to let you
know, how the solution looks like.
As it turns out, a blank line has to be introduced for each new theta:

phi_1 theta_1 r val
...
phi_n theta_1 r val
<blank>
phi_1 theta_2 r val
...
phi_n theta_1 r val

Hope this will help someone else.

Ben