covariance是什么

covariance是什么 variance-covariance matrix是什么意思 统计学covariance, correlation coefficient统计学上 covariance, correlation coefficient是什么意思,能否举例说明?,如果mortgage rate 和number of houses sold 的correlation coefficient是－0.909,那么他们是什么关系呢?可否 covariance和correlation的区别,在金融里的意义是什么I wonder what is the effect of a covariance's value?Or we figured the value of covariance in order to know whether it is positive or negative only?Unlike the correlation,the value tells eviews 相关系数矩阵是什么.怎么做截面数据的相关系数矩阵!用eviews 操作open as group view>covariance analysis>勾选correlation,直接得出一个相关系数矩阵,这个是做的什么相关啊.pearson还是spearman还是都 统计学全英班里的 shortcut for sample covariance hypothesis scoring is distinct from covariance怎么翻译啊? 求问,entry of the matrix.原文是Notice that the consistency requirement is automatically fulfilled if the covariance function specifies entries of the covariance matrix. 英语翻译the point violates the covariance matrix请问这里的violate怎么翻译? Principal component analysis 主成分分析E is the orthogonal matrix whose columns are the eigenvectors of the covariance matrix of x.Su is the covariance matrix of the principle component u.Sx is the covariance matrix of the x. How does var(tr(E) 关于PCA covariance matrix eigenvector的问题最近在做PCA人脸识别,demo已经做出来了,不过理论还不太理解,做PCA怎样把原始数据做出来的covariance matrix来求得的eigenvector就是需要那个减小维度的来投影 spss进行判别分析,进行Box‘s M协方差阵相等检验时,没有检验结果出现,请问是为什么,我该如何处理写的是no test can be performed with fewer than two nonsingular group covariance matrices 英语翻译该从句是the varient approach of breaking the analysis of covariance into that between the leaders and that between multiple respondents rating the same leader 请问如何翻译 有没有matlab White a function based on ‘rand’ togenerate discrete uniform random numbers.2. White a function based on ‘surf’ to create asurface plot of a bivariate normal with mean=[4 4] and covariance matrix=[5 4;4 4].Provide an 关于两组投资covariance的计算Asset A:E(r)=10%,SD(r)=30%Asset B:E(r)=20% SD(r)=50%回报的correlation是0.15第一组投资：80% in A,20% in B (Er=0.12,SDr=27.35%)第二组投资：20% in B,80% in A (Er=0.18,SDr=41.33%)这两组投资的cova 是什么 是什么? 是什么?