Patent ID: 7065542

Claim:
A calculating apparatus for calculating a solution z by using a variable x and a variable y, comprising: a memory for storing table-format data for referencing a value of said variable x by using a value of said variable y 13 and a value of said solution z; and a calculating section, which: inputs a given value x 13 in of said variable x and a given value y 13 in of said variable y and reads out two values y 13 a and y 13 b of said stored variable y 13 corresponding to the given value y 13 in of said input variable y 13 from said memory; reads out two values x 13 aa and x 13 ab of said stored variable x corresponding to the given value x 13 in of said input variable x from said memory in a line corresponding to said value y 13 a of said table-format data; reads out two values x 13 ba and x 13 bb of said stored variable x corresponding to the given value x 13 in of said input variable x from said memory in a line corresponding to said value y 13 b of said table-format data; and calculates the solution z corresponding to the given value x 13 in of said input variable x and the given value y 13 in of said input variable y 13 in an interpolation by using the given value x 13 in of said input variable x, the given value y 13 in of said input variable y, and the read values y 13 a, y 13 b, x 13 aa, x 13 ab, x 13 ba,and x 13 bb.