Then the equation [E;K] = [A, B; B, D]^-1 * [N;M] is not mathematically defined. The inverse of a 6x6 matrix is 6x6. You cannot multiply this with a 4x5 matrix. Actually Matlab was devolopped for exactly such Matrix equations. So using the \ operator will do everything you ...
Vector Magnitude(向量幅度) %Create a vector and calculate the magnitude. v = [1 -2 3]; n = norm(v) % n = 3.7417 1. 2. 3. 4. 5. 1-Norm of Vector clc clear close all % Calculate the 1-norm of a vector, which is the sum of the element magnitudes. X = [-2 3 -1]; n...
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...
(称为:outer product 外积), 4by1矩阵乘以1by4矩阵,结果是:4行4列的% matrix (同一个Row的entry之间用space隔开来,Row与Row之间用semicolon隔开来)A=[1216;5179;3127]% 访问元素 方法一:括号里面是 row和colA13=A(1,3)A31=A(3,1)minorOfA22=A([13],[13])% 逗号前面全是row,逗号后面全是colA...
我猜你的代码应该是 surf(Xp(i),Yp(i),Zp(i)) 出错了吧，当x和y为1*10的向量时，则构成了一个10*10的二维平面，因此此时z应该是一个10*10的矩阵，而不是标量或矢量，错误提示：Z must be a matrix, not a scalar or vector 就是这个意思。
matrix = [1, 2, 3; 4, 5, 6; 7, 8, 9]; 1. 2. 3. 4. 5. 6. 7. 8. 访问数组和矩阵元素 % 访问行向量元素 element = row_vector(3); % 访问列向量元素 element = column_vector(2); % 访问矩阵元素 element = matrix(2, 3); ...
test = [int16(0) int16(0)] i get error : An error occurred while running the simulation and the simulation was terminated Caused by: Error in 'test2/Interpreted MATLAB Function'. Evaluation of expression resulted in an invalid output. Only finite double vector or m...
Next, a block-diagonal matrix Abig is generated to represent the y-derivative part of the Poisson equation. The matrix is constructed by repeating Ax and adding diagonal matrices for the Neumann boundary conditions. The right-hand side f of the Poisson equation is computed based on the given ...
You can use the eye() function to construct a unit diagonal matrix. If you want to change the unit diagonal matrix into a quantity matrix, just multiply the unit diagonal matrix by a constant. 同样使用diag()函数可以获取矩阵的对角线数值。
Instead of doing a matrix multiply, we can multiply the corresponding elements of two matrices or vectors using the .* operator. Get C = A .* B C = 3×3 1 4 0 4 25 -10 0 -10 1 Let's use the matrix A to solve the equation, A*x = b. We do this by using the \ (ba...