相关性分析模型

根据通用模型计算：采用常见的相关系数计算方法，计算结果在-1到1之间，按照半年产生动态的曲线（以全国市场为时间起点）展示相关性分析，选定多个市场价格，计算相关性系数矩阵（以全国市场为准）产生一个相关系数表

Calculations are conducted based on the general model. Using common correlation coefficient calculation methods, the resulting values range between -1 and 1. Dynamic curves are generated every six months, taking the national market as the temporal starting point, to present the correlation analysis. Multiple market prices are selected, the correlation coefficient matrix is calculated with the national market as the benchmark, and a corresponding correlation coefficient table is generated.