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  • 3D Color plot with 'DATASET STRUCTURED GRID'

    From Shahid Maqbool@21:1/5 to All on Sun Aug 7 05:48:01 2022
    Dear all,

    The output of my program has this data structure. I want to plot
    a 3D color plot; so which command I should use here?

    # vtk DataFile Version 2.0
    time_10.vtk
    ASCII
    DATASET STRUCTURED_GRID
    DIMENSIONS 64 64 1
    POINTS 4096 float
    0.000000e+00 0.000000e+00 0.000000e+00
    0.000000e+00 1.000000e+00 0.000000e+00
    0.000000e+00 2.000000e+00 0.000000e+00
    0.000000e+00 3.000000e+00 0.000000e+00
    0.000000e+00 4.000000e+00 0.000000e+00
    .
    .
    .
    POINT_DATA 4096
    SCALARS CON float 1
    LOOKUP_TABLE default
    3.924099e-01
    4.029592e-01
    4.077108e-01
    3.937619e-01
    4.073102e-01
    3.991938e-01
    .
    .
    .

    Best regards
    Shahid

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  • From Karl Ratzsch@21:1/5 to All on Wed Aug 10 22:17:18 2022
    Am 07.08.2022 um 14:48 schrieb Shahid Maqbool:
    The output of my program has this data structure. I want to plot
    a 3D color plot; so which command I should use here?

    Hmm, what you show are at least two data structures:

    # vtk DataFile Version 2.0
    time_10.vtk
    ASCII

    This is the first
    DATASET STRUCTURED_GRID
    DIMENSIONS 64 64 1
    POINTS 4096 float
    0.000000e+00 0.000000e+00 0.000000e+00
    0.000000e+00 1.000000e+00 0.000000e+00
    0.000000e+00 2.000000e+00 0.000000e+00
    0.000000e+00 3.000000e+00 0.000000e+00
    0.000000e+00 4.000000e+00 0.000000e+00
    .
    .
    .

    this is the second
    POINT_DATA 4096
    SCALARS CON float 1
    LOOKUP_TABLE default
    3.924099e-01
    4.029592e-01
    4.077108e-01
    3.937619e-01
    4.073102e-01
    3.991938e-01

    Now what is what? x, y, z? Where does the colour info come from?

    And I'm sure you've checked gnuplot's demo gallery http://gnuplot.sourceforge.net/demo_5.4/ on 3D plots and surfaces.
    What is your plot supposed to look like? What can you make from the
    scripts shown there, what doesn't work for you?

    Best,
    Karl

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  • From Shahid Maqbool@21:1/5 to All on Mon Sep 19 00:02:08 2022
    Now what is what? x, y, z? Where does the colour info come from?

    And I'm sure you've checked gnuplot's demo gallery http://gnuplot.sourceforge.net/demo_5.4/ on 3D plots and surfaces.
    What is your plot supposed to look like? What can you make from the
    scripts shown there, what doesn't work for you?


    The output is the vtk format. The output file is usually used for visualization using Paraview software. I do not know how that software works and how
    it reads. My interest is all about using gnuplot for this output file.

    The output should look like using these commands for 2D matrix data structure:

    set palette rgbformulae 33,13,10
    splot 'data.dat' matrix with pm3d notitle

    Basically, I have two different types of the same problem. One output is in the matrix
    format in dat extension and has worked fine using above mentioned commands. The other output is vtk format and i am trying to understand its plot using gnuplot instead
    of using regular software like Paraview.

    regards,
    Shahid

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