Fit curves are a collection of predefined mathematical functions that you can add to your graph to compare the behavior of your plot with known functions. In addition to the predefined fit curves, you can also create your own custom fit curves. Fit curves can be added to line/scatter plots, step plots, polar plots, and histograms; to 3D ribbon/wall, step plots, and histograms; and to 3D XYZ line/scatter plots and XYZ bar charts.
Adding a Fit to a Plot
To add a fit to a plot:
Click the Home | Add to Graph | Fit Curve command. A linear fit is added by default. The fit type can be changed in the Property ManagerPlot page.
To change the features of a fit plot, including the number of points on the fit curve, open the fit plot properties by selecting the fit plot and editing the properties in the Property Manager. You may also add confidence intervals to a selected fit.
You can change the following fit plot properties:
Symbol (2D plots only)