Data Matrices and Manipulation
zf Data Matrices and Manipulation
Presentation outline ☆1、 Matrices and vectors ☆2、 Random vector 今3、 Multivariate data matriⅸx 4, Population mean vector, covariance and correlation matrices %5. Sample mean vector, covariance and correlation matrices &6, Euclidean, statistical and mahalanobis distances 2021/2/22 2
2021/2/22 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
I Matrices and vectors B A matrix of size n xp is a rectangular array of numbers with n rows and p columns of the form(n行p列矩阵) 11212 2021/2/22
2021/2/22 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 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 2021/2/22 4
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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= A b= B 25 3×2 2021/2/22 5 cxt
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