Extrapolate vs. Interpolate - What's the difference?

Wiktionary

  • Extrapolate (verb)

    To infer by extending known information.

  • Extrapolate (verb)

    To estimate the value of a variable outside a known range from values within that range by assuming that the estimated value follows logically from the known ones

  • Interpolate (verb)

    To introduce (something) between other things; especially to insert (possibly spurious) words into a text.

    "in verse 74, the second line is clearly interpolated"

  • Interpolate (verb)

    To estimate the value of a function between two points between which it is tabulated.

  • Interpolate (verb)

    During the course of processing some data, and in response to a directive in that data, to fetch data from a different source and process it in-line along with the original data.

Oxford Dictionary

  • Interpolate (verb)

    insert (something of a different nature) into something else

    "illustrations were interpolated in the text"

  • Interpolate (verb)

    insert (words) in a book or other text, especially in order to give a false impression as to its date.

  • Interpolate (verb)

    alter or enlarge (a text) by insertion of new material.

  • Interpolate (verb)

    insert (an intermediate value or term) into a series by estimating or calculating it from surrounding known values.

  • Interpolate (verb)

    interject (a remark) in a conversation

    "‘I dare say,’ interpolated her employer"

Webster Dictionary

  • Interpolate

    To renew; to carry on with intermission.

  • Interpolate

    To alter or corrupt by the insertion of new or foreign matter; especially, to change, as a book or text, by the insertion of matter that is new, or foreign to the purpose of the author.

  • Interpolate

    To fill up intermediate terms of, as of a series, according to the law of the series; to introduce, as a number or quantity, in a partial series, according to the law of that part of the series; to estimate a value at a point intermediate between points of knwon value. Compare extrapolate.

Princeton's WordNet

  • Interpolate (verb)

    estimate the value of

  • Interpolate (verb)

    insert words into texts, often falsifying it thereby

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