Alexander Holmes

Last seen: 3 years ago | Active since 2018

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Fast method for findings which rows of a matrix are contained in another
I have two matrices, and . The rows of are a subset of the rows of , and I want to find the row indices of the rows in that c...

5 years ago | 2 answers | 0

2

answers

Question

Solving similar sets of equations multiple times
I have several systems of equations that I want to solve. At each iterations, there's maybe fifty or so sets og equations I want...

5 years ago | 0 answers | 0

0

answers

Question

left eigenvectors using eigs with sparse matrices
Is there any way of using eigs (not eig) to calculate left eigenvectors of a sparse matrix?

5 years ago | 1 answer | 0

1

answer

Question

Produce equality matrix based on elements in vector.
Given two equally sized vectors A and B, is there any way to make a matrix C of 1's and zero's such that the kth row of C contai...

5 years ago | 4 answers | 0

4

answers

Question

Using eigs with singular matrix
I want to calculate the eigenvector corresponding to the 0 eigenvalue of a large, sparse singular matrix. However, if I try eigs...

5 years ago | 1 answer | 0

1

answer

Question

Linear equations with symbolic matrix
I have a set of equations of the form Ax=b, but some of the elements in the matrix are also variables (one variable (y) which I ...

6 years ago | 3 answers | 0

3

answers

Question

Restricting domain of values fzero will try
I am using fzero along with an implementation of the gillespie algorithm to determine a parameter (I know the vale of a paramete...

7 years ago | 2 answers | 0

2

answers

Question

Error with parallel toolbox
I tried running code on a cluster using batch which I fills a 10000 by 10000 matrix with random numbers. I have a script runT...

7 years ago | 1 answer | 0

1

answer