[Gnuplot-py-users] gnuplot.py and pm3d with 4d data

[Marc H. <ho...@is...>]

Hi all,

when using gnuplot directly,  I can create 4d data plots with something 
like:

    set pm3d
    splot 'file.dat' using 1:2:3:4

Where file.dat is the data file, 1,2,3 are the columns with the x,y,z 
data and 4 is the column with the value data which defines the color value.

Now I want to do the same thing using gnuplot.py. In my python program, 
I define 4 lists: x, y,z,val.  I then use the instructions:

    resG = Gnuplot.Gnuplot()
    resG('set pm3d')
    resG.splot(Gnuplot.Data(x,y,z,val))

What I get as a result, is a 3d plot with my points, but no colored 
surface showing val . So my questions are: Can Gnuplot.Data() receive 4 
arguments, which are then passed to splot and pm3d? When using gnuplot 
directly, the file must contain blank lines between two scans 
(isolines). In gnuplot.py do I have to include empty strings in the  
x,y,z,val lists to delimit the isolines? How can I delimit these scans 
in gnuplot.py? Is there an other way to plot my surface using the 
xyz,val lists ( like resG('splot ...') )?

Many thanks in advance.

Marc Hodapp