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Showing posts with the label Matrix

Calculate Weighted Pairwise Distance Matrix In Python

I am trying to find the fastest way to perform the following pairwise distance calculation in Pytho… Read more Calculate Weighted Pairwise Distance Matrix In Python

Numpy: Subtract Matrix From All Elements Of Another Matrix Without Loop

I have two matrices X,Y of size (m x d) and (n x d) respectively. Now i want to subtract the whole … Read more Numpy: Subtract Matrix From All Elements Of Another Matrix Without Loop

Matrix Multiplication For Multidimensional Matrix (/array) - How To Avoid Loop?

I'm trying to evaluate a matrix multiplication with arrays containing multiple matrices to be m… Read more Matrix Multiplication For Multidimensional Matrix (/array) - How To Avoid Loop?

Fill Two-dimensional List With Values Instead Of Initializing It First With Zeros

I have a two-dimensional array that I want to fill up with values that represent powers but my prob… Read more Fill Two-dimensional List With Values Instead Of Initializing It First With Zeros

Finding Word In A Matrix

I have a matrix file (which python reads like a list of lists) and I need to tell if a word from a … Read more Finding Word In A Matrix

How To Split A Matrix Into 4 Blocks Using Numpy?

I'm implementing Strassen's Matrix Multiplication using python. In divide step, we divide a… Read more How To Split A Matrix Into 4 Blocks Using Numpy?

How To Calculate The Base 2 Log Of A Matrix?

The only function that I found that calculates the log of the matrix, and not of each component of … Read more How To Calculate The Base 2 Log Of A Matrix?

Create Upper And Lower Triangular Matrix In Python

I want to create a python program that computes a matrix from a vector with some coefficients. This… Read more Create Upper And Lower Triangular Matrix In Python

How To Generate A Usable Tensor Product Of Two Matrices In Python

This thread successfully answers how to use numpy to calculate the tensor product of two matrices i… Read more How To Generate A Usable Tensor Product Of Two Matrices In Python

Multiplying Column Elements Of Sparse Matrix

I have a sparse csc matrix with many zero elements for which I would like to compute the product of… Read more Multiplying Column Elements Of Sparse Matrix

Variable Changes Without Being Touched

I'm quite new to Python but this is strange. So, I have a matrix (a list of lists) and I pass i… Read more Variable Changes Without Being Touched

Division Of Sparse Matrix

I have a scipy.sparse matrix with 45671x45671 elements. In this matrix, some rows contain only '… Read more Division Of Sparse Matrix

How To Plot An Image From A Connection Matrix?

I want to write a script to create an image from a connection matrix. Basically, wherever there is … Read more How To Plot An Image From A Connection Matrix?

Manipulation Of Csv Format In Python Files

I have combined two lists using zip syntax. When I saved it in csv format, whole data are stayed in… Read more Manipulation Of Csv Format In Python Files

Efficient Pairwise Correlation For Two Matrices Of Features

In Python I need to find the pairwise correlation between all features in a matrix A and all featur… Read more Efficient Pairwise Correlation For Two Matrices Of Features

Adapt Existing Code And Kernel Code To Perform A High Number Of 3x3 Matrix Inversion

Following a previous question ( Performing high number of 4x4 matrix inversion - PyCuda ), consider… Read more Adapt Existing Code And Kernel Code To Perform A High Number Of 3x3 Matrix Inversion

Problems With Scipy.optimize Using Matrix As Input, Bounds, Constraints

I have used Python to perform optimization in the past; however, I am now trying to use a matrix as… Read more Problems With Scipy.optimize Using Matrix As Input, Bounds, Constraints

Efficiently Test Matrix Rows And Columns With Numpy

I am trying to remove both the row i and column i when both the row i and column i contains all 0s.… Read more Efficiently Test Matrix Rows And Columns With Numpy

Python: Find A Word In A Matrix Of Characters

I am trying to create a word game that involves finding words in a matrix of 5x5 characters, like s… Read more Python: Find A Word In A Matrix Of Characters

Why Is A.dot(b) Faster Than A@b Although Numpy Recommends A@b

According to the answers from this question and also according to numpy, matrix multiplication of 2… Read more Why Is A.dot(b) Faster Than A@b Although Numpy Recommends A@b