| 摘要 |
PROBLEM TO BE SOLVED: To provide a counting method which can sequentially know progression in counting without performing individual parallel processing while suppressing the use of a memory capacity by deleting data having a low statistical frequency of occurrence. SOLUTION: The counting method includes: a counting step wherein, while inputting data series into a storage region equivalent data are grouped, and the frequency of the occurrence of each group of equivalent data is counted; a discarding step wherein, when the number of data series input into the storage region reaches the maximum size of the storage region, the whole or part of the counting results in the initial step is discarded; and an updating step wherein a data series is additionally inputted by a number equivalent to one block and counting results are updated. In the counting step, the counting result of each group and an allowable counting error of the group are paired and stored in a storage device. In the discarding step, allowable counting errors of the groups of which the counting results are discarded are updated using the counting results of the groups before discarding. COPYRIGHT: (C)2009,JPO&INPIT
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