The Data Analysis Of China Gross Domestic Product Based On Rough Set

This paper is in the research present condition of the overview Rough Set theories, introduce to gather a type of method and gray system basic theories of foundation up, mainly do following several works.(1) Improve a greedy algorithm for discretization of continuous attribute. At the original arithmetic appear the importance homology to break points, use next the importance of the break point to decide choose to use which break point. Thus reduced the number of break point after attribute discretization and do not know district, reduced the indetermination of the result. So can acquire more complete rule。(2) Put forward a arithmetic of continuous attribute discretization based on gray connection。First consider the of no important attribute that is decide by the gray connection。Make the smaller attribute of importance break point the possibility for eliminate is larger, then to advance efficiency.(3) The data analysis that the theories of Rough Set is apply in Chinese GDP. First analyzed to shortage of the line to return an analytical method. Build up the GPD and the parts of cause and effect of relation of the influence factor and got some useful result.