Statistical processing apparatus capable of reducing storage space for storing statistical occurence frequency data and a processing method therefor

摘要

In a network analyzer (10), a storage (14) stores a set of occurrence frequencies in entire, first and final intervals. An arithmetic processor (12) counts the value while deleting the frequency information based on the stored frequency information. The arithmetic processor (12) determines whether to estimate the occurrence frequency in the interval next to the first interval for the stored frequency information after counting for a predetermined number of data sets or counting the value in each interval. When the determination is true, the difference in occurrence frequency in the first interval and the estimated occurrence frequency are stored as the occurrence frequency in a number, corresponding to the predetermined number - 1, of the intervals shifted by one interval. The occurrence frequency in the next interval is estimated based on the set to store the estimated occurrence frequency in the storage as the occurrence frequency of the first interval in the next data sets.