Figure 2From: Spatial normalization improves the quality of genotype calling for Affymetrix SNP 6.0 arraysImage plots of glog transformed intensities against their locations on the array. The plots correspond to the first array in Set 1 (see Method Section). Colors are proportional to percentiles of the signals; white pixels correspond to non-replicated probes. (a) Raw data: no regional trend is apparent. Median (IQR) = 1150 (562, 2035). (b) Median-centered data: patterns of spatial biases become visible across the array. Median (IQR) = 0.0000 (-0.0360, 0.0362). (c) Wavelet denoising strengthens the evidence for various sources of spatial imperfection. Median (IQR) = -0.0019 (-0.0315, 0.0285). Note: wavelet surface was independently estimated from 4 regions separated by the white bands.Back to article page