Re: Interpreting Partial Least Square Results
I am not an expert on Partial Least Squares (PLS), but I read Minitab's Help info on it. It described Components as being similar to the Factors in Factor Analysis of which I am familiar. It also described the purpose of PLS as condensing a large number of variables, some of which are highly correlated with each other to a reduced number of Components. Again, this is similar to Factor Analysis.
In Factor Analysis, Factors combine multiple variables that are correlated with each other into a single construct or factor that you must name. An example that I have seen took a study to "define" feebleness where many factors , such as gripping strength, arm movement, range of motion, etc. were measured. The study found that many of these measures were correlated and could be reduced to several macro-variables called factors. For example, gripping strength, arm strength, arm range of motion were grouped into a single factor named upper body.
Components appear to be the same concept. Highly correlated predictors are consolidated into a macro-predictor called a component. You must identify what they have in common and name the component.
Minitab uses Loadings to select components. Again, this is similar to Factor analysis. Look at the loading graph. Long lines have high loads. Lines that are very near each other are correlated.
That is as much as I can help you with.
"A fool can learn from his own experiences; the wise learn from the experience of others." - Democritus, 460-370 B.C.