Figure 4
From: Algorithm-driven Artifacts in median polish summarization of Microarray data

Comparison of alternative RMA summarization steps on permutated datasets. The original median polish summarizaion step is plotted with BioConductor alternatives and the transposed median polish of the tRMA method. 1000 groups of arrays for each sample size were selected, and then the averages and standard deviations of inter-array Spearman correlation coefficients were calculated and plotted as in Figure 1.