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From the diagram, which shows the linear indices in the upper left corner of each matrix element, you can see thatA(14)is the same asA(2,4). The single subscript can be a vector containing more than one linear index, as in: A([6 12 15]) ans = 11 15 12 Consider again the prob...
X = [2, 1, 0; 1, 3, 5] % 定义2*3 矩阵 matrix (复数 matrices) X = 2 1 0 1 3 5 size(X) % 测量矩阵的行列数目(行 row,列 column) ans = 2 3 X(1,2) % 矩阵的项X_ij,其中i为行指数 row index,j为列指数 column index ans = 1 X(2,2) ans = 3 A = zeros(2) % 建...
数字1以“\”形对角斜线排列,其他值全部为0的矩阵为单位矩阵(Identity Matrix),记作I(或In×n)。矩阵同单位矩阵相乘时,满足交换率,所得结果为矩阵本身,即A*I = I*A = A。因此,单位矩阵也被称为恒等矩阵。逆矩阵当矩阵A*B=B*A=I时,我们称B是A的逆矩阵(Inverse Matrix),记作B=A^-1,而A则被称为...
When used as an index, the colon operator (:) specifies all the elements in that dimension. The syntax >> x = A(2,:) creates a row vector containing all of the elements from the second row of A. Try creating a variable named density that contains the second column of the matrix nam...
进阶优雅（有病）：varargin varargin的功能 逗号分隔列表 iif登堂入室（病入膏肓）一哭二闹，三上（...
cData(2,2:(startIndex-1)),zData,'k'); end zData = iZ.*ones(1,cData(2,startIndex)); plot3(hAxes,cData(1,(startIndex+1):end),... cData(2,(startIndex+1):end),zData,'k'); pause(.1), drawnow end set(p,'faceColor','r','EdgeColor','w'); ...
The shape and contents of the matrix, as well as the elements of the second expression, are immediately visible to the programmer. Spaces in expressions Closely related to this is the usage of spaces in expressions. The rule is, again: put spaces there where MATLAB's syntax would. Consider...
I want it to work like matlab's lu() function :) but it gave me some errors like "Index in position 2 exceeds array bounds. Index must not exceed 5." ThemeCopy % This code decomposes matrix A into upper and lower triangular matrices. clear; clc; disp('Matlab code ...