In numerical analysis, the Lagrange interpolating polynomial is the unique polynomial of lowest degree that interpolates a given set of data. Given a data set of coordinate pairs ( x j , y j ) {\displaystyle \textstyle (x_{j},y_{j})} , the x j {\displaystyle \textstyle x_{j}} are called nodes and the y j {\displaystyle \textstyle y_{j}} are called values.
In numerical analysis, the Lagrange interpolating polynomial is the unique polynomial of lowest degree that interpolates a given set of data. Given a data set of coordinate pairs ( x j , y j ) {\displaystyle \textstyle (x_{j},y_{j})} , the x j {\displaystyle \textstyle x_{j}} are called nodes and the y j {\displaystyle \textstyle y_{j}} are called values.
Source: Wikipedia "Lagrange polynomial" · CC BY-SA 4.0
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