How does Origin draw 3D discrete points and fit surfaces?

0 Preface

  In data statistical analysis, sometimes you want to know the change of a dependent variable when two independent variables change. At this time, you can draw a scatter diagram, observe the basic situation, and further fit the scatter points to obtain the fitted surface and analyze the data. trend of change. This paper summarizes and records the method of drawing three-dimensional discrete points and fitting the surface.

1. Prepare data

  (1) Raw data (stored in an Excel table);
  

  (2) Copy the 3D point data to the Origin table.
  

2. 3D discrete point parameter setting and drawing

  (1) Change columns A, B, and C to X, Y, and Z respectively;
  

  (2) Select all the data and execute the menu function: Drawing → 3D → 3D Scatterplot.
  

3. Fitting surface parameter setting and drawing

  (1) Select the graph and execute the menu function: Analysis → Fitting → Nonlinear Surface Fitting → Open the dialog box: Select the function Gauss2D → Fitting;
  

  (2) Get the result.
  

References:
[1] weixin_39796363. Scatterplot 3D surface graph_How to use Origin for multiple linear regression, exponential fitting and nonlinear surface fitting? … ; 2021-01-13 [accessed 2023-06-26].
[2] Tuboshu. Origin drawing tutorial 10-3D scatter plot plus fitting surface ; 2020-11-28 [accessed 2023-06-26 ].
[3] Brick-moving scholar Rong. Origin 3D nonlinear surface fitting tutorial ; 2022-01-26 [accessed 2023-06-26].