gnuplot-beta

Data presentation question.

[Justace C. <pro...@co...>]

Gnuplot users and developers,

	I have a small question concerning plotting.  I have a 4-D data set,
x,y,z, and scalar value.  I would like to plot this and get a grid  a 3D
grid with the color of the grid point mapped to a color based on the 4th
column number.  I thought this was the default for the pm3d style.  But
it is not.  I did some searching online but I did not find a whole lot
of information out there about it.  I found a lot of example of pm3d
stuff but not what I was looking for.  Possibly it can not be done.  Can
anybody give me any guidance on this.  Thanks in advance.

Justace

P.S.  Here are the first few lines of the data file....

  0.0500000007  0.0399999991  0.200000003  1.03786671
  0.0500000007  0.0399999991  0.400000006  1.03786671
  0.0500000007  0.0399999991  0.600000024  1.03786671
  0.0500000007  0.0399999991  0.800000012  1.03786671
  0.0500000007  0.0399999991  1.  1.03786671
  0.0500000007  0.0799999982  0.200000003  1.03824031
  0.0500000007  0.0799999982  0.400000006  1.03824019
  0.0500000007  0.0799999982  0.600000024  1.03824031
  0.0500000007  0.0799999982  0.800000012  1.03824031
  0.0500000007  0.0799999982  1.  1.03824031

Re: Data presentation question.

[Hans-Bernhard B. <br...@ph...>]

Justace Clutter wrote:

> 	I have a small question concerning plotting.  I have a 4-D data set,
> x,y,z, and scalar value.  I would like to plot this and get a grid  a 3D
> grid with the color of the grid point mapped to a color based on the 4th
> column number.  I thought this was the default for the pm3d style.  But
> it is not. 

I wonder what made you think it would be...

PM3D plots coloured solid surfaces.  Not grids (--> lines), not points, 
but solid-filled triangulated surface meshes.


	set pm3d explicit
	splot 'datafile' using 1:2:3:4 with points palette

should do what you want.