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So my objective is the following, given the size of the matrix s, I am attempting to create a matri… Read more Constructing A Special Matrix In Numpy Dynamically

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

I can sum the items in column zero fine. But where do I change the code to sum column 2, or 3, or … Read more Sum Matrix Columns In Python

I understand that eigenvectors are only defined up to a multiplicative constant. As far as I see al… Read more Eigenanalysis Of Complex Hermitian Matrix: Different Phase Angles For Eig And Eigh

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

Say I have two arrays: import numpy as np arr1 = np.array(['faucet', 'faucets', … Read more Return Similarity Matrix From Two Variable-length Arrays Of Strings (scipy Option?)

I'm trying to fit a Theano model that is parametrized in part by a symmetric matrix A. In order… Read more Initializing A Symmetric Theano Dmatrix From Its Upper Triangle

Im looking for an efficient 'for loop' avoiding solution that solves an array related probl… Read more How Do You Efficiently Sum The Occurences Of A Value In One Array At Positions In Another Array

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

I wonder what could be the easiest way to create a bi-dimensional array, that has for each row the … Read more Simpler Way To Create A Matrix/list Of Indices?

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 create an arbitrary 2x2 matrix: In [87]: mymat = np.matrix([[2,4],[5,3]]) In [88]: mymat Out[88]… Read more Eigenvectors Created By Numpy.linalg.eig Don't Seem Correct

I am trying to somehow expand numpy matrices, which typically look like: import numpy as np mtx = … Read more Expand Numpy Matrix

In numpy, I have an array of N 3x3 matrices. This would be an example of how I'm storing them (… Read more Multiple Matrix Multiplication

I'm new to Python and I have a solution for this but it seems slow and silly, so I wondered if … Read more Python: Writing Large Array Of Arrays To Text File

I am currently trying to speed up my large sparse (scipy) matrix multiplications. I have successful… Read more Is It Possible To Use Blas To Speed Up Sparse Matrix Multiplication?

I have the following dictionary: g = { 'A': ['A', 'B', 'C'], '… Read more How Do I Generate An Adjacency Matrix Of A Graph From A Dictionary In Python?

I have lots of matrices (as result of rotations, etc.), but I would be sure to store them only once… Read more Set Of Matrices

I am looking for python oneliner that will create matrix with the given order and fill values from … Read more Python Oneline To Create Matrix Of Given Order

I have 2 big matrices: Xn = np.matrix(X) Xnt = Xn.transpose() Then Xn is like this: … Read more Numpy Matrix Multiplication Error