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Figure 1 | BMC Bioinformatics

Figure 1

From: A proposed metric for assessing the measurement quality of individual microarrays

Figure 1

Distributions of geography index (GEODEX) values of individual chips of experiment A. a. Black circles and white upper triangles represent GEODEX computed by model (1) and model (2), respectively. Black rectangles and white diamonds represent GEODEX computed by model (2), using measurements in the log scale on base 2 and trimmed measurements after removing four blocks on the corners, respectively. b. For comparisons between different measures of gene expression, black circles, white circles, and black upper triangles represent GEODEX of difference (PM-MM) measurements of pairs of the perfect match (PM) and mismatch (MM) probes, of PM-only measurements, and of MM-only measurements, respectively. GEODEX were computed by model (2) (NB = 36). X-axis indicates a chip identification number and Y-axis indicates the degree of GEODEX.

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