Tutorial:3D Plotting

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Summary

In Origin, most 3D plots -- including 3D surface, wire frame/wire surface, 3D bar plot and 2D contour -- are created from an Origin matrix. In most cases, the raw data is XYZ data and you should convert it to a matrix first, using one of Origin's built-in gridding routines.

Minimum Origin Version Required: Origin 8.0 SR6

What you will learn

This tutorial will show you how to:

  • Create a 3D graph in Origin
  • Convert Worksheet data to a Matrix
  • Use the layer contents dialog to add/remove a dataset
  • Use the Plot Details dialog to modify graph

Steps

  1. Import the file \Samples\Matrix Conversion and Gridding\XYZ Random Gaussian.dat.

  2. Highlight the 3rd column, right-click, and select Set As: Z from the context fly-out menu.

  3. To convert the worksheet XYZ data into a matrix, highlight the whole worksheet, select Worksheet: Convert to Matrix: XYZ Gridding to bring up the XYZ Gridding dialog. Confirm Replace Duplicates with item is set to Mean as shown below:
    Image:Tutorial_3D_Plot_002new.png
  4. And you can see the right preview panel as below. Since the XY data are randomly distributed, a random gridding method should be used.

    Image:Tutorial_3D_Plot_001.png
  5. Use the following settings and click OK to convert the XYZ columns of data into a matrix of data. The Thin Plate Spline gridding method will generate a smooth surface.

    Image:Tutorial 3D Plot 003New.png

  6. Set the newly generated matrix as the active window and select Plot: 3D Surface: Wire Frame from the menu to plot a 3D mesh:

    Image:Tutorial_3D_Plot_004.png

  7. In order to plot the original data points on the graph, you can use the Layer Contents. Right-click on the layer icon (the small grey box in the upper left corner of the graph window) and select Layer Contents.

    Image:Tutorial_3D_Plot_005.png

    In the Layer Contents dialog, select Worksheets in Folder from the available data box (in the upper left corner of the dialog). Click on the Plot Type button Image:Button_Plot_Type.png, and select 3D Scatter/Trajectory/Vector in the list. Then select the worksheet Z column and click the -> button to add it to the right panel list.

    Image:Tutorial_3D_Plot_006.png

    After you click the Apply button, the source data will be added to the layer.

    Image:Tutorial_3D_Plot_007.png

  8. You can now use the Plot Details dialog to modify the appearance. Double-click on the graph to bring up the Plot Details dialog. On the left panel, select the 3D scatter data

    Image:Tutorial_3D_Plot_008.png

    and then go to the Symbol tab located on the right panel and adjust the size and color of the data.

    Image:Tutorial_3D_Plot_009.png

    Remove the drop lines on the Drop Lines panel:

    Image:Tutorial_3D_Plot_010.png

  9. When done, click OK to accept the modifications:

    Image:Tutorial_3D_Plot_011.png
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