I generated a scatterplot for Multiple Linear Regression analysis using Sigmaplot software and I want to display the regression equation. But, I couldn't able to do it. Can anybody suggest to me how to display the equation on sigma plot.
Hi Dear Fiseha, your idea sounds great, but as far as I know it may be challenging to do unless you only have 2 arguments in your fitting function, and you can visualize it in 3D space using scatter plots and fitting planes (for linear regression). However, by analogy, if the number of arguments is 3 or more than 3, you may need to use 4 or more dimensions to place data scatter points and the fitting hyperplanes. While color mapping can be helpful in understanding higher-dimensional situations when the number of arguments is small, it is also extremely challenging to display in a regular graphical interface. On the other hand, too many visual parameters can leave you and the results ambiguous or difficult to interpret. As far as I know, I recommend you considering structural equation maybe. It is based on graph theory, showing the coefficients of all associated paths, and it is suitable for nonlinear cases. Here's a paper I recently saw on ResearchGate, "Modeling the role of emotion regulation and critical thinking in immunity in higher education" by Li M, et al., DOI: 10.3389/fpsyg.2022.1005071. The potential software is the Amos module in IBM-SPSS. Hope that I could answer your question. Best Regards, Ziyu Qi
Dear Fiseha, when in presence of a multiple linear regression, the usual way of representing it in a bivariate space is to use as axes :
X axis = expected value of Y from the fitted equation
Y axis = observed value of Y.
This representation will give rise (if the equation has a decent fit) of the cloud of points elongated along the main diagonal of the plot (Y=X) allowing you to estimate by eye ouutliers, corresctly fitted points and so forth...
https://alfasoft.com/blog/products/how-to-do-simple-linear-regression-and-multiple-regression-analysis-with-sigmaplot/
To display Multiple Linear Regression Equations in SigmaPlot software, you can use the Regression Wizard, the Dynamic Fit Wizard and the Global Curve Fitting Wizard found in SigmaPlot Version 12. SigmaPlot includes many statistical methods and hundreds of regression equations to choose from, and you can add your own customized regression equation if needed.
- Badges
- Science topic
- Similar topics
- Geoscience
- Asia
- India