| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a sampling device capable of suitably acquiring the whole trend for a data source which is not optimized for a search. <P>SOLUTION: There is provided the sampling device that samples records at random from a plurality of records recorded in a storage device, the sampling device including random number generation means of generating a random number corresponding to a recording position, record selection means of selecting a record having data at a recording position corresponding to the generated random number from the plurality of records, record length acquisition means of acquiring the record length of the selected record, and sample determination means of employing the selected record as a sample with a probability calculated based upon the acquired record length. <P>COPYRIGHT: (C)2013,JPO&INPIT |
