A missing, but powerful, tool in the PHP arena is a language-based math library. In this two-part series, Paul Meagher hopes to inspire PHP developers to develop and implement a PHP-based math library by providing you with an example of how a library of analytic models might be developed. In this first part, he demonstrates how to develop and implement the heart of a Simple Linear Regression algorithm package using PHP as the implementation language. In Part 2, the author adds features to the package for a useful data-analysis tool for small- to medium-sized datasets. Read Simple linear regression with PHP: Part 1 tutorial here.

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