PCA Graphical User Interface

The PLS toolbox by Eigenvector Research (2004) is a veiy useful tool to perform a principal component analysis. When the toolbox is installed under Matlab, it can be called by typing pea. The following graphical user interface appears  

File Edit Preprocess Analysis Tools Help 

Percent Variance Captured by PCA Model Principal Eigenvalue % Variance % Variance Component of Cov(X) This PC Cumulative 

When the data set X5 is loaded into the workspace (using load X5), go to File , select Load Data , load X-block and load X5. Data auto-scaling should be performed You could select Preprocess to change this. Now calculate the principal components by selecting calc , the window as shown in Fig. 22.3 will appear. 

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