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StatsToDo : Curve Fitting Program

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Curve Fitting Explained Page

Program References

Data Entry

The data has 2 columns separated by spaces or tabs. Col 1 is the x or independent variable, and col 2 is the y or dependent variable. Data from each subject is in its own row.

Two power parameters for the polynomial fit are provided, one for the mean, the other for variance. Please note that power must be less than the number of rows, and capped at 5 for mean and 3 for variance. Curve firtting beyond the third power for mean and second power for variance have little practical meaning in the bio-medical domain.

The percentage confidence interval defines the higher and lower curves which represent percentage confidence interval of the curve fit

Click button to run example, or enter user data and click button to run

Power for curve fit of mean
Power for curve fit of variance
Percentage Confidence Interval

MacroPlot Code