| 摘要 |
PROBLEM TO BE SOLVED: To easily estimate the approximate degree of items in files or data bases, which are work-processed, and to reduce the burden of a data base manager buy calculating the average value of item data of the generated first and second files and the covariance of item data based on an increase file which is increase-generated from original file and calculating a mutual correlation coefficient. SOLUTION: A file increase means 6 stores the plural files which are increase-generated from the original file 100 in the increase file 1. A file generation command means 7 reads the file stored in the increase file 1, processes them in a first process 4 so as to store then in the first file 2, reads item data stored in the first file 2, and processes them in a second process 5 so as to store them in the second file 3. An analysis means 8 reads item data belonging to the respective file from the first and second files (2 and 3) and calculates an index value showing the approximate degree between item data. |
