Top "Matrix-multiplication" questions

Questions related to matrix multiplication, especially implementation.

How to get element-wise matrix multiplication (Hadamard product) in numpy?

I have two matrices a = np.matrix([[1,2], [3,4]]) b = np.matrix([[5,6], [7,8]]) and I want to get the element-wise product, [[1*5,2*6], [3*7,4*8]], equaling [[5,12], [21,32]] I …

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how does multiplication differ for NumPy Matrix vs Array classes?

The numpy docs recommend using array instead of matrix for working with matrices. However, unlike octave (which I was using …

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Matrix Multiplication in pure Python?

I'm trying to multiply two matrices together using pure Python. Input (X1 is a 3x3 and Xt is a 3x2): …

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Matrix multiplication using arrays

I'm trying to make a simple matrix multiplication method using multidimensional arrays ([2][2]). I'm kinda new at this, and I just …

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matrix multiplication algorithm time complexity

I came up with this algorithm for matrix multiplication. I read somewhere that matrix multiplication has a time complexity of …

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Difference between numpy dot() and Python 3.5+ matrix multiplication @

I recently moved to Python 3.5 and noticed the new matrix multiplication operator (@) sometimes behaves differently from the numpy dot operator. …

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Matrix expression causes error "requires numeric/complex matrix/vector arguments"?

ma=diag(3)+t(da)%*%da R Code above, error message as follows: Error in t(da) %*% da : requires numeric/complex …

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CUDA determining threads per block, blocks per grid

I'm new to the CUDA paradigm. My question is in determining the number of threads per block, and blocks per …

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Why is MATLAB so fast in matrix multiplication?

I am making some benchmarks with CUDA, C++, C#, Java, and using MATLAB for verification and matrix generation. When I …

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Multiply 2 matrices in Javascript

I'm doing a function that multiplies 2 matrices. The matrices will always have the same number of rows and columns. (2x2, 5…

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