eFunda: Polynomial Curve Fitting
engineering fundamentals Polynomial Curve Fitting
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This calculator finds the least-squares fit to a list of two-column data as a polynomial up to a specified order.

The size of input data is limited to 1024 points or less to converve system resources. The input format must be strictly followed to have a correct data parsing.

Inputs   Help
Numerical data only. Input data must have "," between columns and ";" between rows. [Space], [Tab], and [Enter] will be ignored.
Numerical Data:  0.0, 0.414551; 0.1, 0.534459; 0.2, 0.682073; 0.3, 0.643164; 0.4, 0.768891; 0.5, 0.660281; 0.6, 0.664503; 0.7, 0.828999; 0.8, 1.02235; 0.9, 1.08677; 1.0, 1.07689; 1.1, 1.05097; 1.2, 1.18515; 1.3, 1.18178; 1.4, 0.895727; 1.5, 0.79358; 1.6, 0.804691; 1.7, 0.859215; 1.8, 0.916542; 1.9, 0.731479; 2.0, 0.61559; 2.1, 0.638317; 2.2, 0.583177; 2.3, 0.46666; 2.4, 0.366097; 2.5, 0.289775; 2.6, 0.170107; 2.7, 0.0399892; 2.8, -0.0634148; 2.9, -0.16235; 3.0, -0.274137; 3.1, -0.390202; 3.2, -0.388586; 3.3, -0.627472; 3.4, -0.460055; 3.5, -0.566657; 3.6, -0.718847; 3.7, -0.616809; 3.8, -0.946822; 3.9, -1.13584; 4.0, -0.782122; 4.1, -0.992098; 4.2, -1.20449; 4.3, -1.01899; 4.4, -1.16592; 4.5, -1.19063; 4.6, -0.812425; 4.7, -1.10856; 4.8, -0.752746; 4.9, -0.655559; 5.0, -0.737509; 5.1, -0.799995; 5.2, -0.546093; 5.3, -0.531922; 5.4, -0.516011; 5.5, -0.472423; 5.6, -0.348306; 5.7, -0.190675; 5.8, -0.0981659; 5.9, 0.0110435; 6.0, 0.110407; 6.1, 0.207854; 6.2, 0.379377; 6.3, 0.400733;
Fitting Function:  Fit above data using polynomial a0 + a1x + a2x2 + ... + anxn,
where n = , ai (i = 0, 1,..., n) are constants to be determined.
Output: 
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