When do I use PLS and what is the advantage of using JMP Pro for PLS?
Oct 22, 2015 4:25 AM
Peter Bartell firstname.lastname@example.org suggests using Partial Least Squares when Ordinary Least Squares (Standard Least Squares in JMP) is not sufficient.
The PLS platform in JMP fits linear models based on linear combinations of the explanatory variables (Xs). These factors are obtained in a way that attempts to maximize the covariance between the Xs and the response or responses (Ys). PLS exploits the correlations between the Xs and the Ys to reveal underlying latent structures.
PLS is useful where the use of ordinary least squares does not produce satisfactory results including when you have more X variables than observations; highly correlated X variables; a large number of X variables; several Y variables; and many X variables.
JMP Pro provides additional functionality to conduct PLS Discriminant Analysis (PLS-DA), include a variety of model effects, use several validation methods, impute missing data, and obtain bootstrap estimates of the distributions of various statistics.
IN JMP Pro, PLS is a Fit Model personality that gives additional functionality over JMP by:
fitting responses with a nominal and continuous data type
fitting polynomial, interaction, and categorical effects
offering a larger set of validation and cross validation methods including a train/validate/test construct, Kfold, Leave-One-Out and Holdback %
imputing missing data
providing Bootstrap estimates of distributions of select statistics.