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Figure 1 | BMC Bioinformatics

Figure 1

From: A novel application of quantile regression for identification of biomarkers exemplified by equine cartilage microarray data

Figure 1

MA plot to remove intensity dependent bias. A MA plot was used to remove intensity dependent dye bias and array-specific effects, where M = log2 (R/G) and A = log2 R G MathType@MTEF@5@5@+=feaafiart1ev1aqatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacPC6xNi=xH8viVGI8Gi=hEeeu0xXdbba9frFj0xb9qqpG0dXdb9aspeI8k8fiI+fsY=rqGqVepae9pg0db9vqaiVgFr0xfr=xfr=xc9adbaqaaeGaciGaaiaabeqaaeqabiWaaaGcbaqcfa4aaOaaaKqbGgaacqWGsbGucqWGhbWraeqaaaaa@2F66@ . Above are two MA plots representative of the twenty cDNA microarray slides used for this study. The first plot illustrates unnormalized data and the second plot is the same data after Lowess (LOcally WEighted polynomial regreSSion) normalization.

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