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. 2014 Feb 3;15(2):R29. doi: 10.1186/gb-2014-15-2-r29

Figure 2.

Figure 2

voom mean-variance modeling.(a) Gene-wise square-root residual standard deviations are plotted against average log-count. (b) A functional relation between gene-wise means and variances is given by a robust LOWESS fit to the points. (c) The mean-variance trend enables each observation to map to a square-root standard deviation value using its fitted value for log-count. LOWESS, locally weighted regression.