DATA STORAGE METHOD AND DEVICE THEREFOR

PROBLEM TO BE SOLVED: To reutilize the data of an overlapping part between both partial arrays without moving them in storing a new partial array instead of an already stored partial array. SOLUTION: In this data storage method, partial array data extracted from two-dimensional array data are already stored in a memory, and when the partial array data to be newly stored are extracted, by a step S10, the storage start position of the extracted partial array data is decided so as to keep the storage position in the memory for element data at the overlap part of the partial array data already stored in the memory and the newly extracted partial array data. Then, by S11-S13, the respective element data excluding the element data of the overlap part of the newly extracted partial array data are stored from the decided storage start position.