Calculating apparatus and its method
View Patent ↗A calculating apparatus comprises a memory and a calculating section. The memory is stored with table data for referencing a value of a variable x by using a value of a variable y and a value of a solution z. The calculating section inputs x_in and y_in, reads two values y_a and y_b corresponding to y_in from the memory, reads two values x_aa and x_ab corresponding to x_in from the memory in a line corresponding to y_a, reads two values x_ba and x_bb corresponding to x_in from the memory in a line corresponding to y_b, and calculates a solution z corresponding to x_in and y_in in an interpolation by using x_in and y_in and the read values y_a, y_b, x_aa, x_ab, x_ba, and x_bb.
1. 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.
2. The apparatus according to claim 1 , wherein said table-format data has values of said variable y 13 and said solution z given at more precise intervals in a region requiring a high-precision calculation than in a region not requiring a high-precision calculation, so that the corresponding variable x is given at more precise intervals.
3. The apparatus according to claim 1 , wherein said table-format data is obtained directly from an experimental result.