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[DOC File]Matlab Tutorial
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The same theory as above regarding their multiplication follows here. This time a*b works (a is a 3 X 3 matrix and b is a 3 X 1 matrix). a*b In this case the commands: a.*b b.*a yield errors. This is because there is not the same number of elements to do an element by element multiplication. You still can transpose a and multiply it by b.
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[DOC File]Matrices
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The same is true of matrix addition and subtraction, but – and this has important ramifications for your work with Matlab – matrix multiplication is generally not commutative: that is, if A and B are two matrices, in general . The significance of this is that the ordering of matrices is important when you’re setting up the calculation of ...
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[DOC File]Matrix Multiplication
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Write a function that finds the result of multiplication of two matrices. Inputs are. m = number of rows of [A] p = number of columns of [A] or number of rows of [B] n = number of columns of [B] Output is the matrix [C], where [C]=[A][B] function C=my_mult(m, p, n, A, B) Conduct the following tests of the function in a separate testing mfile.
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[DOC File]Matrices
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Now, practice your matrix multiplication by checking to see if multiplication by the identity matrix is commutative by comparing the products AI with IA, BI with IB, and CI with IC. Hint: refer to Equation 1 to see if you need to use identity matrices of different dimensions to calculate the product IA, IB, and IC.
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[DOC File]A Quick Introduction to Matlab
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using Matlab. To enter a matrix in Matlab, we’ll just make a 3 by 3 matrix: M = [ 1 -1 1;-6 0 1; 0 -5 -1] The semicolons inside the brackets make new rows in the matrix. We also need a column vector for the voltages. V = [ 0;-11;-10] And that’s all the input data. Now let’s do some algebra. To invert the matrix call. M^-1 % invert the matrix
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[DOC File]The MATLAB Notebook v1.5.2
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32 Notice that MATLAB does not distinguish between a 1x1 matrix (which is what vTw really is) and its single entry. Neither do we ordinarily, but we should remember that the product of a scalar with a matrix is not in general an instance of matrix multiplication. Notice also that the dot product is symmetric as regards v and w.
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How to do matrix multiplication in matlab