gnuplot-info

[Gnuplot-info] plotting a cloud of 3D points colored based on a 4th dimension

[Francois B. <ber...@ri...>]

Dear gnuplot hackers,

I have some file like this:

---
0 1 2 7
1 1 2 8
2 1 2 9
[...]
---

In fact in my file all numbers are floats
but I don't think its important to illustrate my point.

I'd like to plot the 3 first columns as points
in 3D and use the 4th column to make their color vary.

Is this possible?

I tried several things and even found some close
topic in the demos (cf. third example here 
http://gnuplot.sourceforge.net/demo_4.3/heatmaps.html)
but did not manage to get what I want.

Thanks a lot,
Francois.

Re: [Gnuplot-info] plotting a cloud of 3D points colored based on a 4th dimension

[BBands <bb...@gm...>]

Is this the sort of plot that you want?

http://dirsig.blogspot.com/2010/11/lidar-point-cloud-visualization.html

John

On Mon, Jun 20, 2011 at 12:45 AM, Francois Berenger <ber...@ri...> wrote:
> Dear gnuplot hackers,
>
> I have some file like this:
>
> ---
> 0 1 2 7
> 1 1 2 8
> 2 1 2 9
> [...]
> ---
>
> In fact in my file all numbers are floats
> but I don't think its important to illustrate my point.
>
> I'd like to plot the 3 first columns as points
> in 3D and use the 4th column to make their color vary.
>
> Is this possible?
>
> I tried several things and even found some close
> topic in the demos (cf. third example here
> http://gnuplot.sourceforge.net/demo_4.3/heatmaps.html)
> but did not manage to get what I want.
>
> Thanks a lot,
> Francois.