Modeling and Multivariate Methods - SAS

Chapter 21 Fitting Partial Least Squares Models 517
Model Fit Options
Figure 21.12 Plot of X Loadings
Loading Scatterplot Matrices
the Y loadings.
Shows a scatterplot matrix of the X loadings and a scatterplot matrix of
Correlation Loading Plot Shows a scatterplot matrix of the X and Y loadings overlaid on the same plot.
Check boxes enable you to control labeling.
X-Y Score Plots Includes the following options:
Fit Line Shows or hides a fitted line through the points on the X-Y Scores Plots.
Show Confidence Band Shows or hides 95% confidence bands for the fitted lines on the X-Y Scores
Plots. Note that these should be used only for outlier detection.
Score Scatterplot Matrices Shows a scatterplot matrix of the X scores and a scatterplot matrix of the Y
scores. Each scatterplot displays a confidence ellipse. These may be used for outlier detection. For
statistical details on the confidence ellipses, see “Confidence Ellipse for Scatter Scores Plots” on page 522.
Distance Plots Shows a plot of the distance from each observation to the X model, the corresponding
plot for the Y model, and a scatterplot of distances to both the X and Y models (Figure 21.13). In a good
model, both X and Y distances are small, so the points are close to the origin (0,0). Use the plots to look
for outliers relative to either X or Y. If a group of points clusters together, then they might have a
common feature and could be analyzed separately.