Testing Periodicity in Short Series and Application to Gene Expression Data |
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Authors: | M Shahidul Islam |
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Institution: | 1. Department of Statistical and Actuarial Sciences , The University of Western Ontario , London, Ontario, Canada islam@stats.uwo.ca |
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Abstract: | Testing for periodicity in microarray time series encounters the challenges of short series length, missing values and presence of non-Fourier frequencies. In this article, a test method for such series has been proposed. The method is completely simulation based and finds p-values for test of periodicity through fitting Pearson Type VI distribution. The simulation results compare and reveal the excellence of this method over Fisher's g test for varying series length, frequencies, and error variance. This approach is applied to Caulobacter crescentus cell cycle data in order to demonstrate the practical performance. |
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Keywords: | Fisher's g test Non-Fourier frequency Periodicity testing Short time series |
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