最近的一个软件项目有一个要求，导出从一系列的数据点的二次曲线的方程。这就是说，以确定，和c，其中，即y = ax2+ bx + c的。在确定A，B和C，我也需要一个R-平方值（决定系数）。

我有一个模糊的记忆称为最小二乘回归“的东西，所以回谷歌，我就去了。-A recent software project had a requirement to derive the equation of a quadratic curve from a series of data points. That is to say, to determine a, b, and c, where y = ax2+ bx+ c. Having determined a, b, and c, I would also need a value for R-squared (the coefficient of determination).

I had a vague recollection of something called　Least Squares Regression , so back to Google I went.