Figure 4.

ROC analysis for allele ratio. The x-axis is the rate of false positives (in log₁₀), computed as the proportion of autosomal markers that have allele ratio above a threshold. The y-axis depicts sensitivity, defined as the proportion of X chromosome markers in the cell line carrying 3X chromosomes that have copy number values below the same threshold. The curve is generated by calculating these values at many different thresholds.