说明：  用C语言编制的PLS程序源代码：偏最小二乘法（PLS）是基于因子分析的多变量校正方法，其数学基础为主成分分析。但它相对于主成分回归（PCR）更进了一步，两者的区别在于PLS法将浓度矩阵Y和相应的量测响应矩阵X同时进行主成分分解：
(PLS program source code compiled with the C: partial least squares (PLS) is a multivariate calibration method based on factor analysis, the mathematical basis of the main component analysis. But it goes a step further with respect to the principal component regression (PCR), the difference between the two is that the PLS method the concentration matrix Y and the corresponding measured response matrix X while the principal component decomposition:)