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bil


Last seen: 2 months ago |  Active since 2022

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Generating a matrix of 0s and 1s with constrained domains
Hi all, I'd like to generate an n x n matrix of 0s and 1s with the constraint that the number of domain walls is equal to m. I ...

2 months ago | 2 answers | 0

2

answers

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Vectorizing a Simple(?) Operation
Hi all, This might be a bit of a fruitless question but I just want to confirm there is no other method. I want to know if ther...

3 months ago | 0 answers | 0

0

answers

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What About My Matrix Makes eig Inaccurate?
Hi all, I want to understand what about my matrix is causing eig to return inaccurate eigensystem calculations. The code to rep...

5 months ago | 1 answer | 0

1

answer

Question


Improving Precision of Eigenvectors with Large Eigenvalues
Hi all, This is a bit of a generic question, but I was hoping someone could provide some insight on how I could improve the pre...

5 months ago | 1 answer | 0

1

answer

Question


Picking Branch Cut of Square Root
Hey all, I just wanted to know if there was a way of making matlab pick a different branch cut for the square root. Consider th...

1 year ago | 1 answer | 0

1

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Speeding up matrix exponentials
Hey all, I am trying to speed up the calculation of matrix exponentials but the process is not fast enough and I cannot think o...

1 year ago | 1 answer | 0

1

answer

Question


Normalizing an FFT Vector
Hey all, I am currently trying to understand how exactly to normalize an fft eigenstate in the context of the 1-d particle in ...

1 year ago | 2 answers | 0

2

answers

Question


Speeding up matrix operations
Hey all, I would like advice on speeding up the following operation: Suppose we have a filled NxN matrix A, a filled NxM matri...

1 year ago | 3 answers | 0

3

answers

Question


lsqnonlin initial conditions (transcendental equation)
Hey all, I am trying to fit a transcendental equation to some data points but I am coming across the issue where lsqnonlin ends...

1 year ago | 2 answers | 0

2

answers

Question


Fitting a Transcendental Equation with Multiple Solutions
Hey all, I would like to know if there is a way to fit a transcendental equation with multiple solutions. For example, if I had...

1 year ago | 1 answer | 0

1

answer

Question


Bessel Equation VPASolve for the order
Hi all, I am trying to solve a simple equation like syms E eqn1 = besselk(E,3)==5 vpasolve(eqn1,E) for the variable E. But...

2 years ago | 1 answer | 0

1

answer

Question


vpasolve all solutions?
Hey all, I was wondering if there was an efficient way of finding all the unique solutions to an equation using vpasolve in a g...

2 years ago | 1 answer | 0

1

answer

Question


Riemann Siegel Theta Equation
Hey all, I wanted to know how I would solve an equation involving the Riemann Siegel theta function (https://en.wikipedia.org/w...

2 years ago | 1 answer | 0

1

answer

Question


Eig takes too long
Hi All, I am currently trying to find the eigenvectors for this 5x5 matrix but Matlab seems to be taking incredibly long to do ...

2 years ago | 2 answers | 0

2

answers