Varcap
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Purpose
Variance captured for each variable in PCA model.
Synopsis
- vc = varcap(x,loads,scl,plots)
Description
VARCAP calculates and displays the percent variance captured for each variable and number of principal components in a PCA model. Inputs are the properly scaled M by N data x (i.e. scaled using the same scaling used when creating the PCA model) with associated N by K loadings matrix loads. Optional input scl (1 by N) specifies the x-axis for plotting. Optional input plots suppresses plotting when set to 0 {default = 1}. The output is a K by N matrix of variance captured vc for each variable and each number of PCs considered (vc is number of PCs by number of variables). A stacked bar chart of vc is also plotted. Optional input plots suppresses plotting when set to 0 {default = 1}.