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# Marcus Rosales

Last seen: 2 jours ago Active since 2019

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Question regarding how matrices are stored in memory
I'm trying to get a simulation running which requires a big matrix ( N~400), so being smart with memory is important. The issue...

22 jours ago | 1 answer | 0

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Question

Feature for eigs involving just positive eigenvalues
Hello, just a quick question involving eigs(). There's an option to find the N eigen values closest to an eigenvalue E, but is t...

3 mois ago | 1 answer | 0

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Interpolation for 2D matricies
Basically just wondering if matlab has a feature where you can interpolate a given matrix. For instance, say you have an NxN mat...

6 mois ago | 1 answer | 0

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Question

Accessing order pair from sparse matrix
Hello, my question has to do with accessing the indicies of a sparse matrix. Say we define \$S=sparse(M)\$, then if we put in the...

6 mois ago | 2 answers | 0

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Finding average of matrix elements within a specified window
So I am trying to clean some plots up and I think I can do so if I had a function which took in some matrix A and returned a new...

6 mois ago | 1 answer | 0

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Question

Filling in gaps in plot
Hello, I am trying to generate some plots which look a little prettier than what I currently have. An example is attached. I am...

6 mois ago | 1 answer | 0

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Question

Need Help Understanding a peculiar result when comparing MATLAB's Eigenvectors to my own
Hello everyone, I am working on a simulation and have ran into an issue. To begin I am starting off with a 2D tight binding Hami...

7 mois ago | 0 answers | 0

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Help Cleaning up some plots
Hello, I have some plots I got from a simulation, which give me the results I should be getting. My advisor asked me to clean th...

11 mois ago | 0 answers | 0

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Question

Filtering a 2D plot from pcolor
Hello, just wondering what a good way to filter a plot obtained from a matrix of values, M, when using pcolor(m) with shading in...

environ un an ago | 1 answer | 0

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Question

Using an external hard to run a bigger simulation
Sooo I have been trying to do a simulation to produce some plots for some time now and it is now apparent that I need to use a b...

plus d'un an ago | 1 answer | 0

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Question

Error when saving a work space
Hello, I am trying to save a workspace after I run a simulation but something seems to be going wrong... I have attached two scr...

plus d'un an ago | 1 answer | 0

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Question

Can you edit a pcolor plot after generating one?
Hopefully an easy question here. I am using pcolor's interpolation option to give me a map of a fourier transform (FT) of an NxN...

plus d'un an ago | 1 answer | 0

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Question

Ways of plotting a matrix
Hello, I am working on a simulation which diagonalizes a matrix for me, then I take the eigen vectors of said matrix and build a...

plus d'un an ago | 1 answer | 0

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Question

Need better resolution in my plot!
Hello, I am working on a plot of a local density of states and want to know if anyone has any suggestions to improve the reso...

plus d'un an ago | 1 answer | 0

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Question

Tight binding simulation issues
Hello, This may be too far on the physics side of things, but I figured I may try and ask anyways. My main issue comes from the...

presque 2 ans ago | 0 answers | 1

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Using existing arrays in workspace
You might find memoize useful.

presque 2 ans ago | 0

| accepted

Question

Using existing arrays in workspace
Hello, I am currently writing some code which finds the eigenstates of a Hamiltonian, but each time I run the code I need to so...

presque 2 ans ago | 3 answers | 0