A response to information criterion-based clustering with order-restricted candidate profiles in short time-course microarray experiments |
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Authors: | Shyamal D Peddada David M Umbach and Shawn F Harris |
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Institution: | (1) Biostatistics Branch, National Institute of Environmental Health Sciences Research, Triangle Park, NC 27709, USA;(2) SRA International Inc, Durham, NC 27713, USA |
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Abstract: | Background For gene expression data obtained from a time-course microarray experiment, Liu et al. 1] developed a new algorithm for clustering genes with similar expression profiles over time. Performance of their proposal
was compared with three other methods including the order-restricted inference based methodology of Peddada et al. 2, 3]. In this note we point out several inaccuracies in Liu et al. 1] and conclude that the order-restricted inference based methodology of Peddada et al. (programmed in the software ORIOGEN)
indeed operates at the desired nominal Type 1 error level, an important feature of a statistical decision rule, while being
computationally substantially faster than indicated by Liu et al. 1]. |
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