Figure 3
Two methods of pooling standard deviations of M: sorting by I avg or by I min . The standard deviation (σM) is pooled by taking the moving average of the variance (σM 2). (a) Measured (σM, gray) and pooled (σM'(Iavg), black) standard deviation of the logged ratio M, plotted against Iavg. For spots with σM' > σM, the average residual error is 0.28; for spots with σM' < σM, the average residual error is 0.31. (b) Measured (σM, gray) and pooled (σM'(Imin), black) standard deviation of M, plotted against Imin. For spots with σM' > σM, the average residual error is 0.28; for spots with σX' < σX, the average residual error is 0.31. (c) Pooled standard deviation of M (σM') plotted against the intensity metric used for pooling, Iavg or Imin. Data are from Dataset 3.