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 perform matrix multiplication … Read more
matrix
Bomb dropping algorithm
I have an n x m matrix consisting of non-negative integers. For example: 2 3 4 7 1 1 5 2 6 2 … Read more
Transposing a 2D-array in JavaScript
I’ve got an array of arrays, something like: [ [1,2,3], [1,2,3], [1,2,3], ] I would like to transpose it to get the following … Read more
numpy matrix vector multiplication [duplicate]
This question already has answers here: how does multiplication differ for NumPy Matrix vs Array classes? (8 answers) Closed 8 years ago. When … Read more
What are the most widely used C++ vector/matrix math/linear algebra libraries, and their cost and benefit tradeoffs? [closed]
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Want to improve this question? Update the question … Read more
How do you rotate a two dimensional array?
Inspired by Raymond Chen’s post, say you have a 4×4 two dimensional array, write a function that rotates it 90 degrees. Raymond links … Read more
How can I index a MATLAB array returned by a function without first assigning it to a local variable?
For example, if I want to read the middle value from magic(5), I can do so like this: M = magic(5); value = … Read more
Difference between numpy.array shape (R, 1) and (R,)
In numpy, some of the operations return in shape (R, 1) but some return (R,). This will make matrix multiplication more tedious since … Read more
What are the differences between numpy arrays and matrices? Which one should I use?
What are the advantages and disadvantages of each? From what I’ve seen, either one can work as a replacement for the other if … Read more
Transpose/Unzip Function (inverse of zip)?
I have a list of 2-item tuples and I’d like to convert them to 2 lists where the first contains the first item … Read more