Figure 3.

(a) Score plots of the first two LV components of the OPLS DA model using mean-centering and unit variance scaling (for a 4-component model, RMSEC = 0.0934 and RMSECV = 0.1304). The schizophrenia cohort is shown in red, and the control group in green. (b) Back-scale projection of loading vector LV 1 to coloring coded according to the absolute value of the particular loading weighted by correlation of the spectral data set and score matrix from the OPLS-DA model. Part of the loading plot belonging to the residual water signals was omitted from the plot.