中文说明：用matlab实现去趋势互相关分析的DCCA算法，将两组数据分析其协方差，最后得到DCCA指数，并进行T检验
English Description：
The DCCA algorithm of de trend cross-correlation analysis is realized by MATLAB. The covariance of the two groups of data is analyzed. Finally, DCCA index is obtained and t-test is carried out