Create a 1-by-5 vector. v = [2 1 -1 -2 -5]; Usediagto create a matrix with the elements ofvon the main diagonal. D = diag(v) D =5×52 0 0 0 0 0 1 0 0 0 0 0 -1 0 0 0 0 0 -2 0 0 0 0 0 -5 Create a matrix with the elements ofvon the first super diagona...
Create a 1-by-5 vector. v = [2 1 -1 -2 -5]; Usediagto create a matrix with the elements ofvon the main diagonal. D = diag(v) D =5×52 0 0 0 0 0 1 0 0 0 0 0 -1 0 0 0 0 0 -2 0 0 0 0 0 -5 Create a matrix with the elements ofvon the first super diagona...
Create Diagonal Matrices Create a 1-by-5 vector. v = [2 1 -1 -2 -5]; Usediagto create a matrix with the elements ofvon the main diagonal. D = diag(v) D =5×52 0 0 0 0 0 1 0 0 0 0 0 -1 0 0 0 0 0 -2 0 0 0 0 0 -5 ...
matlab创建对角型矩阵 对角矩阵(diagonal matrix)是一个主对角线之外的元素皆为0的矩阵,常写为diag(a1,a2,...,an) 。对角矩阵可以认为是矩阵中最简单的一种,值得一提的是:对角线上的元素可以为 0 或其他值,对角线上元素相等的对角矩阵称为数量矩阵;对角线上元素全为1的对角矩阵称为单位矩阵。对角矩阵的运算...
Does anybody know how to create a matrix where only the main diagonal and the diagonal above and below it have values, the rest being zeros? e.g A=[1 2 3 4 5] B=[5 6 7 8] C=[9 10 11 12] The main diagonal will be A and the diagonal above and below will be B and C...
% Construct the block diagonal matrix % まずブロック対角行列成分を作成 %%分块对角矩阵的生成 dd = eye(Nx); %Nx阶单位阵 ca=Ax/dx^2 - 2*dd/dy^2; %y向差分使主对角元还要再减,减的同时考虑网格长dx,dy,构造“主块”,用ca表示 sca=sparse(ca); %将此Nx阶三对角阵以稀疏阵形式存储为sca...
十二、Some Special Matrix(一些特殊的矩阵) 1、linspace():linearly spaced vectors(线性间隔向量) 2、eye(n):n X n identity matrix(单位矩阵) 3、zeros(n1,n2):n1 X n2 zero matrix(0矩阵) 4、ones(n1,n2):n1 X n2 matrix with every entry as 1(1矩阵) 5、diag():diagonal matrix(对角矩阵) ...
% Matrix manipulation. % cat - Concatenate arrays. % reshape - Reshape array. % diag - Diagonal matrices and diagonals of matrix. % blkdiag - Block diagonal concatenation. % tril - Extract lower triangular part. % triu - Extract upper triangular part. ...
Thediagfunction places the input elements on the diagonal of a matrix. For example, create a row vectorAcontaining four elements. Then, create a 4-by-4 matrix whose diagonal elements are the elements ofA. A = [12 62 93 -8]; B = diag(A) ...
If A is a matrix whose columns represent random variables and whose rows represent observations, C is the covariance matrix with the corresponding column variances along the diagonal. 如果A是矩阵,其列表示随机变量,其行表示观测值,则C是协方差矩阵,沿对角线具有相应的列方差。(协方差矩阵的协方差是...