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Mastering JMP®
Using Partial Least Squares: When Ordinary Least Squares Regression Just Won’t Work
Presenter: Peter Bartell
About PLS
The presenter describes when and why PLS is useful, describes the advantages of the PLS implementation in JMP Pro over that in JMP, and introduces the case studies he will present to demonstrate using PLS in JMP Pro.
Key Attributes for New Product: Case Study
The presenter uses consumer ratings for 24 types of bread to demonstrate how to use PLS to identify product attributes to help guide new bread formulation and design processes. He uses leave-one-out cross-validation and shows how to examine and interpret Root Mean Press; NIPALS Fit x and y scores for a single latent factor; Diagnostic Plots; and VIP vs Coefficients Plots. He uses the Prediction Profiler to maximize desirability.
Multicollinearity Chemometrics: Case Study
The presenter shows how to create a model to evaluate the levels of three different compounds in spectral emissions of water samples. He uses the Model Comparison summary to see how x and y scores correlate and to identify which variables explain variation. He shows how to save prediction values to the data table, which will be useful to the model if new observations are added.
Discriminant Analysis for Cancer Risk: Case Study
The presenter uses Discriminant Analysis to demonstrate how to determine if genetic expression information can be used to accurately classify estrogen receptor status. He uses data that includes over 10,000 gene expression characteristics from a study of 230 individuals. He shows how to explore missing values; interpret ROC curves; and examine misclassification, false positives and false negatives.