alezinhacris

I am profiling a numpy dot product call. numpy.dot(pseudo,pseudo) pseudo is a numpy array of cust… Read more Reasons Of Slowness In Numpy.dot() Function And How To Mitigate Them If Custom Classes Are Used?

I have a 3D matrix in python as the following: import numpy as np a = np.ones((2,2,3)) a[0,0,0] = … Read more Converting 3d Matrix To Cascaded 2d Matrices

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?

Let say we have two matrices A and B. A has the shape (r, k) and B has the shape (r, l). Now I want… Read more How To Calculate The Outer Product Of Two Matrices A And B Per Rows Faster In Python (numpy)?

I want to fill a matrix from an array of indices : import numpy as np indx = [[0,1,2],[1,2,4],[0,1… Read more Fill A Matrix From A Matrix Of Indices

MY input(just for example): from numpy import * x=[['1' '7'] ['1.5' '… Read more Python Matrix, Any Solution?

I have searched around and tried to find a solution to what seems to be a simple problem, but have … Read more Sort A Numpy Python Matrix Progressively According To Rows

I have an object which is described by two quantities, A and B (in real case they can be more than … Read more Build Matrix From Blocks

I have the following matrix A in R: # [,1] [,2] [,3] [,4] # [1,] -1.152777… Read more Inconsistent Results Between Lu Decomposition In R And Python

I would like to convert a numpy array with dtype=object to a sparse array e.g. csr_matrix. However,… Read more Convert Numpy Object Array To Sparse Matrix

import numpy as np a=np.array([[4,2,6],[3,6,5]]) b=np.array([3,5]) I want to update the numbers in… Read more How To Change Values In Numpy Array

In this question six months ago, jez was nice enough to help me come up with a fast approximation f… Read more Fast Weighted Scatter Matrix Calculation

Essentially, I'm looking for an efficient piece of code to generate the following matrix: [[1 2… Read more Creating An Identity Matrix Containing Diagonally Determined Values

Does Python or any of its modules have an equivalent of MATLAB's conv2 function? More specifica… Read more Is There A Python Equivalent Of Matlab's Conv2 Function?

I have two matrices [A](Expected_matrice) , [B](Predicted_matrice) I need to create the third one [… Read more How Can Display Differences Of Two Matrices By Subtraction Via Heatmap In Python?

How to return a set of rows of a NumPy Matrix that would match a given condition? This is a Numpy M… Read more How To Get A Subset Of Rows From A Numpy Matrix Based On A Condition?

I have a tensor U composed of n matrices of dimension (d,k) and a matrix V of dimension (k,n). I w… Read more Tensor Multiplication With Numpy Tensordot

I'm trying the following: Given a matrix A (x, y ,3) and another matrix B (3, 3), I would like … Read more Numpy - Multiple 3d Array With A 2d Array

I have a .dat file, that contains three columns - userID, artistID and weight. Using Python, I read… Read more Create Sparse Matrix With Pandas And Fill It With Values From One Column Of .dat File At Indexes [x,y] From Other Two Columns Of .dat File

I am trying to create a 2d matrix so that each cell contains a list of strings. Matrix dimensions a… Read more 2d Array Of Lists In Python