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FastPval 1.0

Company: University of Hong Kong
Date Added: September 23, 2013  |  Visits: 205


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FastPval is a two stage p-value computation software which compute the empirical p-value by two stage ranking strategy, it can produce very low P-value based on huge dataset. This fast and powerful tool takes advantage of a delicate cutoff which separate the exactly significant area. Compared to the traditional ranking method, Tspvc has a good time efficiency, lower memory consuming and tiny storage spaces with high accuracy.<br /><br />Traditionally, exact P-value computation based on permutation is needed for sorting the dataset before ranking. For huge dataset(more than 1 billion values), the time complexity of sorting time will be long(nlogn). Furthermore, surprisingly, the space complexity will be very large(1 billion dataset will take ~4G memory).<br /><br />We adopt this two stage strategy in order to reduce the computation time and overcome memory restriction using the exact P-value computation method especially in the huge dataset. At first stage, we make a random sampling array (which means the first model) with given sampling number (up to the volume of dataset) and sort it. Then we select the satisfied array (which means the second model) from the dataset with the cutoff number which fetched form the first sampling array. So, directly, we can compute the approximate P-value with those two model.

Requirements: No special requirements
Platforms: Mac, Mac OSX
Keyword: Adopt Datasetmore Large Order Overcome P Value Reduce Restriction Space Surprisingly
Users rating: 0/10

License: Shareware Size: 112.64 KB
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