Curve Fitting - Easy Data Reading (Copy from txt File and Paste in LAB Fit)


  Note: The Copy-and-Paste Method can be used for up to 300 points. To read any amount of data, use the IMPORT Option (Imp button),
            which performs the read operation using dynamic memory allocation.



  All results obtained by LAB Fit in a curve fitting can be accessed through a dialog box
   like the one shown below:





  Rejection button: displays all possible experimental points called "outliers" (if any) that is, outside the "Prediction Band" (95.4% confidence level), which could be eliminated from the dataset.
                                Note: This test should be avoided if the residuals do not approximate a normal distribution (even minimally). See the fictitious example with few data points (Y = A * X + B):
                                (1, 2); (2, 4); (3, 5); (4, 7); (5, 9); (6, 45). Visually, point 6 can be rejected! The fit of the function to the other 5 points, with extrapolation to X=6, shows a prediction band that
                                corroborates the visual removal.

  Details button: displays a complete report of all results obtained during the curve fitting process, including intermediate results.

  Evaluate button: displays the results of Y(X) for user-specified X values, including average values and their uncertainties (95.4% confidence level).

  Residuals button: displays the scatter plot of residuals, including the result of the Durbin-Watson test.

  OK button: Displays the graph of the fitted function (2D and 3D cases) or returns to the software's main menu.


  Attention: When the "OK" button is clicked, closing the "LAB Fit - Results" dialog box, various pieces of information regarding the completed fit
                      become available by clicking one of the buttons labeled "R Fin", "R Fit", "R Gr" or "Files".





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