Principal component analysis (PCA) is a multivariate analysis
technique for transforming the original measurement variables
into new variables called principal components (PCs). In general,
the slopes and curve shapes presented in Fig. 2 show differences
between starch samples for the same amount of added starch. To
determine differences and starch origins, PCA was performed using
all data sets provided by the measurements. PCA on the basis of the
correlation matrix of the data provides the results given in Fig. 3
for the scores