For the sample used in the PLS model, GG1 and GG5 are clearly separated but there is also a clear trend difference among the GG2, GG3, and GG4 groups which were not part of the PLS model training set.
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For the sample used in the PLS model, GG1 and GG5 are clearly separated but there is also a clear trend difference among the GG2, GG3, and GG4 groups which were not part of the PLS model training set.