Data Matrices and Manipulation
zf Data Matrices and Manipulation
Presentation outline ◆1、 Matrices and vectors 令2、 Random vector 3 Multivariate data matrix 4, Population mean vector, covariance and correlation matrices %s 5, Sample mean vector, covariance and correlation matrices 6. Euclidean statistical and mahalanobis distances 2021/1/21
2021/1/21 2 cxt Presentation Outline ❖ 1、Matrices and vectors ❖ 2、Random vector ❖ 3、Multivariate data matrix ❖ 4、Population mean vector, covariance and correlation matrices ❖ 5、Sample mean vector, covariance and correlation matrices ❖ 6、Euclidean, statistical and Mahalanobis distances
1、 Matrices and vectors %o a matrix of size n xp is a rectangular array of numbers with n rows and p columns of the fom(n行p列矩阵) 息 4=a1a2…马 息 2021/1/21 xt
2021/1/21 3 cxt 1、 Matrices and vectors ❖ A matrix of size n p is a rectangular array of numbers with n rows and p columns of the form（ n 行 p列 矩阵）
表一 表二 语文数学 语文数学 85 80 88 83 甲乙丙 90 82 甲乙丙 92 85 75 63 76 66 2021/1/21
2021/1/21 4 cxt
这两个长方形数表都叫做矩阵,并简记为 8580 8883 A=9082,B=9285 7563 7666 矩阵A和B都具有3行2列,故称为3×2矩阵 记为 A=A32,B=B32 2021/1/21 cXt
2021/1/21 5 cxt