How do I create a 3D response surface plot(Contour Plot) from X Y Z C points ?

Hi All,

I am new to matlab and struggling a lot in creating a contour plot/surface plot with the dataset I have. I worked for a month and still no good results.

My dataset is a XYZC columns and has nearly 3 million rows.

          X        Y              Z                 C 
  0.666666667    0.00E+00      41.41300016       0.00E+00 
  2              0.00E+00      41.41300016       0.00E+00 
  0.666666667    0.00E+00      40.40292699       1.33E-04 
  2              0.00E+00      40.40292699       1.33E-04 
  0.666666667    0.00E+00      39.39285381       1.91E-04  
  2              0.00E+00      39.39285381       1.91E-04 
  0.666666667    0.00E+00      38.38278064       2.39E-04 
  2              0.00E+00       38.38278064      2.39E-04 
  0.666666667    0.00E+00       37.37270746      2.81E-04 
  2              0.00E+00       37.37270746      2.81E-04 

I want to plot a 3D interactive visualization which looks similar to the image attached.

If my question is not clear, i can explain in detail.

Please help me in this.

THank in advance

[dpb]

What generated the image and what does it represent?

[Rajashekar Veerabhadra]

The image is from techplot.

The image represent the aperture of a frature network. Something related to petroleum.

[dpb]

"The image is from techplot [sic]."

Why am I not surprised? TecPlot has a zillion features very difficult to emulate in MATLAB being as it was written by and specifically for FE analysis.

I was hoping maybe having an idea of what were looking at might stir the pot a little on how to try to simulate something...unfortunately, nothing comes to mind at the moment.

I'd guess if you want somebody to really explore any to attach enough data in a .mat file to be able to reproduce a portion of the grid above; just the tiny snippet probably isn't enough to have to get a handle on with.

[Rajashekar Veerabhadra]

Yes Agree on your point regarding techplot.

I hope with the help of matlab expects, We can figure out to do a similar plot(not exactly) in matlab.

I have attached the datafile in the description.

Thanks

[Rajashekar Veerabhadra]

Please let me know if anything idea on how to proceed strikes on your mind. :)

Answer 1

[Bjorn Gustavsson]

That plot looks like it would be reproducible with scatter3. So have a look at the help and documentation of that function. One thing that mightbe helpful is to sort the data-points such that the most significant are first (that helped me, at least in earlier versions)

HTH

[Rajashekar Veerabhadra]

THanks for your suggestions. The plot is not a scatter plot. I have tried working on scatter3 which does not yield the same result.

[Bjorn Gustavsson]

Well, then (to me) it seems like a number of pseudo-coloured stripes, that are long in the vertical direction and narrow in the x-(?)direction. Each such band/ribbon could be produced with surf. Then it would just be a question of how to group your data into such ribbons, and loop accordingly? (definitely try: shading flat to avoid the grid-lines hiding your data.) This might take "a bit of time" to plot if you have very many bands.