Figure 3
From: Metrics for evaluating the stability and reproducibility of mass spectra

Correlation matrices without smoothing based on Pearson’s r coefficients (A) and the cosine measure between vectors (B) for two different samples (from different patients) of brain tissue from non-tumor pathology (Int1 and Int2) and two fragments of one sample classified as a glioblastoma (Gb1 and Gb2) and one classified as a meningioma (Mn1 and Mn2).