matrix-multiplication

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Optimizing NumPy with Cython

I am currently trying to optimize the code that I had written in pure Python. This code uses NumPy very heavily as I am working with NumPy arrays. Below you can see the simplest of my classes that I c[详细]

2023-02-17 01:58 分类：问答
Confused by localize matrix - works when passed to OpenGL but not when doing my own arthmetic?

I\'m very confused as to what my problem is here. I\'ve set up a matrix which converts global/world coordinates into a local coordinate space of an object. This conversion matrix is constructed using[详细]

2023-02-15 13:57 分类：问答
numpy tensordot related issue

I have a specific issue with multiplying matrices in numpy. Here is an example: P=np.ar开发者_开发技巧ange(30).reshape((-1,3))[详细]

2023-02-15 05:49 分类：问答
Receiving transformed mouse event data from DOM objects with a CSS 3D transform

Is there currently any data in a javascript mouse event that would allow me to easily find or calculate a mouse position relative to the 3D space of a transformed element?[详细]

2023-02-15 05:09 分类：问答
how do multiply different sized matrices in c

I\'m looking for a way to multiply a 2x1 and a 2x2 matrix together but my code doesn\'t work almost every time and even when it does work I have to put the numbers into the code. It doesn\'t wok if i[详细]

2023-02-14 20:09 分类：问答
Difference between Multiply Transformation Matrix by Opengl function( glMultMatrixf() ) and my own function

all, I am trying to multiply a matrix to a vector in OpenGL, but it turn out that the rendering result I got by calling my own multiplication function(OpenGLUtility::VectorMultiMatrix4d()) is differen[详细]

2023-02-13 03:51 分类：问答
Matrix multiplication running times Python < C++ < Matlab - Explain

I have a matrix M thats\'s 16384 x 81. I want to compute M * M.t (the result will be 16384x16384). My question is: could somebody please explain the running time differences?[详细]

2023-02-11 22:07 分类：问答
Can UIPinchGestureRecognizer and UIPanGestureRecognizer Be Merged?

I am struggling a bit trying to figure out if it is possible to create a single combined gesture recognizer that combines UIPinchGestureRecognizer with UIPanGestureRecognizer.[详细]

2023-02-09 13:05 分类：问答
MATLAB matrix multiplication vs for loop for each column

When multiplying two matrices, I tried the following two options: 1) res = X*A; 2) for i = 1:size(A,2) res(:,i) = X*A(:,i);[详细]

2023-02-08 17:35 分类：问答
OpenMP parallelizing matrix multiplication by a triple for loop (performance issue)

I\'m writing a program for matrix multiplication with OpenMP, that, for cache convenience, implements the multiplication A x B(transpose) rows X rows instead of the classic A x B rows x columns, for b[详细]

2023-02-05 03:07 分类：问答