What is extrapolation and interpolation? - Definition from WhatIs.com

Definition

extrapolation and interpolation

Part of the Mathematics glossary:

Extrapolation is an estimation of a value based on extending a known sequence of values or facts beyond the area that is certainly known. In a general sense, to extrapolate is to infer something that is not explicitly stated from existing information.

Interpolation is an estimation of a value within two known values in a sequence of values. Polynomial interpolation is a method of estimating values between known data points. When graphical data contains a gap, but data is available on either side of the gap or at a few specific points within the gap, interpolation allows us to estimate the values within the gap.

See a brief tutorial on extrapolation and interpolation:

This was last updated in September 2015
Posted by: Margaret Rouse

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