Fig. 4
From: Label-free data standardization for clinical metabolomics
Mass spectra of the same blood plasma sample obtained at different ranges of mass detection before (a) and after (b) standardization, according to the SantaOmics algorithm. The overlapping area of the standardized mass spectra (c) demonstrated the similarity in peak intensities. R2, coefficient of determination for linear approximation of the data calculated for peak intensities; r, correlation coefficient