(ORG-5412)

Sample OPJ to download to try:  Partial Least Squares Regression.opj

Partial least squares (PLS) is a method for constructing predictive models when there are many factors and they are highly collinear. It is useful for variable selection and dimension reduction

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To perform partial least squares in Origin, select Statistics: Multivariate Analysis: Partial Least Square

How to

The data in the example are reported in Umetrics (1995); the original source is Lindberg, Persson, and Wold (1983). Suppose that the scientist is researching pollution in the Baltic Sea, and they would like to use the spectra of samples of sea water to determine the amounts of three compounds present in samples from the Baltic Sea: lignin sulfonate (pulp industry pollution), humic acids (natural forest products), and detergent (optical whitener).

The scientist also has data of the spectra emission intensities at different frequencies in sample spectrum (v1-v27)

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