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Abstract

Even though interpolating bivariate data by Lagrange interpolation is straightforward, its repetitive calculations are quite boring and complicated if the number of data is large. Hence, there is a need to have a suitable tool in teaching and learning Numerical Methods for this topic. To simplify things, we have developed an Excel spreadsheet calculator to interpolate the bivariate data with 4 rows by 4 columns using Lagrange interpolation. The spreadsheet calculator can be used by educators and students who need its full solution. In addition, users only need to enter a dataset, two independent variables, and the values of the two independent variables which are not in the dataset to obtain a bivariate approximation solutions table in the respective target cells automatically. Besides, the excel command given helps in the teaching and learning process of this topic using Excel spreadsheet.

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