Supplementary Figure 7: Outlier detection test for healthy controls and ovarian cancer samples.
From: Standardization of complex biologically derived spectrochemical datasets
a, Hotelling’s T2 versus Q residuals test based on a PCA using 8 PCs (99.07% cumulative variance) for healthy control samples depending on the instrument for spectra acquisition (A, B and C) used by operator 2. b, Hotelling’s T2 versus Q residuals test based on a PCA using 5 PCs (96.92% cumulative variance) for cancer samples depending on the instrument for spectra acquisition (A, B and C) used by operator 2. Circled sample in a indicates an outlier removed. The Hotelling’s T2 versus Q residuals test for operator 1 is depicted in Supplementary Fig. 2c,d.
