Figure 7From: Comprehensive analysis of correlation coefficients estimated from pooling heterogeneous microarray dataAssessment of biases of the correlation coefficients estimated from 19 groups of expression data.B ρ ̂ xy = ∑ i = 1 19 λ i ( ρ ̂ xy − ρ ̂ xy , i ) 2 19 for (a) ρ ̂ xy = r xy , the Pearson correlation coefficients estimated directly from the large expression matrix; (b) ρ ̂ xy = r ̄ xy , the average of correlations between expression profiles within i = 1,19 groups; ρ ̂ xy , i is the correlation between expression profiles within each group.Back to article page