Processing apparatus for calculating an approximate value to an analytical value with a tolerance maintained and a method therefor

Abstract

In an approximation computation apparatus, a location monitor designates, each time the number of data of a received data sequence exceeds an integer l, a starting location of the received data for calculating reduced received-data; a dimensionality reducer dimensionally reduces each data sequence including the received data after the corresponding designated starting location by random projection to generate the reduced received-data; an object selecting controller controls an object in response to a result of monitoring from the location monitor of the number of the received data reaching another integer n, deletes currently-stored object data, selects the reduced received-data after the oldest reduced received-data in the reduced received-data, and substitutes and updates an object data sequence to the selected reduced received-data; and a coefficient approximator calculates an approximate value of a wavelet coefficient on the basis of the object data and a wavelet matrix.