About this tool: Polynomial Interpolation
Interpolate up to 20 points with distinct x values and evaluate the polynomial at a chosen coordinate.
Enter 2–20 x; y pairs, one per line, with distinct x coordinates. The interpolating polynomial passes through every point; it is different from a least-squares regression line. Values outside the data interval are extrapolations, and high-degree curves can oscillate substantially.
How the calculation works
Worked example
| Pairs: x; y, one per line | 0; 1 1; 2 2; 5 |
| Predict for x | 1.5 |
P(1.5) = 3.25
Questions and answers
What does this tool do?
Interpolate up to 20 points with distinct x values and evaluate the polynomial at a chosen coordinate. Enter 2–20 x; y pairs, one per line, with distinct x coordinates. The interpolating polynomial passes through every point; it is different from a least-squares regression line. Values outside the data interval are extrapolations, and high-degree curves can oscillate substantially.
What affects precision and input format?
Enter 2–20 x; y pairs, one per line, with distinct x coordinates.
Where are the calculations performed?
The calculation runs in your browser. You can use the tool without installing software.
Asted Cloud
Comments (0)
Share your thoughts — please be polite and stay on topic.
Log in to comment