Anthony Barone

Actif depuis 2015

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Hi, I have this function , can help me to vectorize it? thanks
I think this will work. % % % % % CREATE MASK FOR MATRIX MULTIPLICATION % % % % % % each column computes the summation...

plus de 7 ans il y a | 0

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Major speed reduction (~50x) when doing multiple matrix multiply operations in a row. Is this a (major) bug? Any ideas for a fix?
The code I am running more-or-less implements the following % PREALLOCATE. For the current tests I'm running: N=1200, M=2049...

plus de 7 ans il y a | 1 réponse | 1

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Interpolating matrices of different sizes to the same size
<https://www.mathworks.com/help/matlab/ref/interp1.html interp1> will do what you want. I find that using it with the 'pchip' fl...

plus de 7 ans il y a | 0

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Is it possible to create a sparse binary (.bin) file on disk?
In case anyone comes across this question looking for the same thing...at some point in the last year I figured out a much bette...

plus de 7 ans il y a | 1

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How does MATLAB internally store sparse arrays / Calling MKL's sparse BLAS library for sparse matrix operations
SHORT VERSION <https://software.intel.com/en-us/mkl-developer-reference-fortran-sparse-matrix-storage-formats This is a list ...

plus de 7 ans il y a | 1 réponse | 1

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access to matlab history while running in nodesktop mode
This question is old and the original poster has probably long since mved on, but I figured in case anyone else comes across thi...

plus de 7 ans il y a | 0

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Bug with 'imread' - is there any way around this?
*Issue*: when you use windows to rotate an image, Matlab's 'imread' function does not acknowledge the image rotation and instead...

environ 8 ans il y a | 1 réponse | 1

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Question re: Matlab Coder, OpenMP, and compiling the code on a different machine than i was generated.
I have a loop I want to convert to Paralellized C code. My machne (Windows 10) has both Matlab Coder and the Parallel computingt...

environ 8 ans il y a | 1 réponse | 0

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Distributed Computing with RamDisk
This may or may not be related and is more of a general "this might be worth looking into" suggestion than something specific, b...

environ 8 ans il y a | 1

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Can Matlab "Memory Map" actual memory addresses?
Id like to be able to memory map a set of actual memory addresses and access data from those addresses from multiple instances o...

environ 8 ans il y a | 1 réponse | 0

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New laptop: better i7-7920hq or Xeon E3-1535M v6 for matlab?
I doubt there will be much of a difference. They both use the same generation of CPU Architecture (Kaby Lake) and have effective...

plus de 8 ans il y a | 0

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Is it possible to improve fread/fwrite performance and further speed up loading/writing of binary data?
I am working on a project that requires reading and writing large amounts of binary data from disk (10's to 100's of GB). I've m...

plus de 8 ans il y a | 1 réponse | 0

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Please help me create a tall array from a large binary file and "fileDatastore" without running out of memory.
I have a large data file (the particular file I am working with now is ~60gb, though a few hundred gb's is typical) that I want ...

plus de 8 ans il y a | 2 réponses | 0

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How can you set up very large Tall Arrays without Running into swap/page-file issues
I recently tried setting up a tall array, using the following (approximate) code: ds=fileDatastore(filename,'ReadFcn',@myda...

plus de 8 ans il y a | 2 réponses | 0

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Is there a way to limit file and internet access in Matlab?
The use case I am thinking of is: If you are running code that you found online, it might be smart to run it in an "isolated...

plus de 8 ans il y a | 1 réponse | 0

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Does matlab use the AVX instruction set? If so what version?
Advanced Vector Instructions, or AVX, allows multiple floating point and integer operaions to be performed simultaneously, and i...

presque 9 ans il y a | 1 réponse | 3

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Is it possible to create a sparse binary (.bin) file on disk?
I have a project where I would like to save my results to a binary (.bin) file that is stored on disk. Results need to be saved ...

presque 9 ans il y a | 3 réponses | 0

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memmapfile system memory usage and transfer rate
Are you using memory mapped .mat files? If so, and this is just a guess, but it could be because .mat files use compression (wel...

presque 9 ans il y a | 0

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Possible memory leak with "matfile"? (R2016b)
I'm running a code where the results I am generating are saved to disk using matfile. It is running on matlab R2016b on a Linux ...

presque 9 ans il y a | 1 réponse | 0

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How to make a figure larger than fullscreen?
I am trying to generate figures larger than my current screen resolution, and matlab doesnt seem to let me. I have a 1080p scree...

plus de 9 ans il y a | 2 réponses | 0

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Avoid "depth limit" for nested parenthesis and brackets
MATLAB has a limit of 32 nested parenthesis / brackets, and I have a function that requires more than this. Can this limit be av...

plus de 9 ans il y a | 1 réponse | 3

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Numerical (finite difference) and analytic (symbolic toolbox) derivative do not agree.
I have a rather complicated function (6 free variables and 1 fixed variable) that I am trying to find the jacobian of. I know of...

plus de 9 ans il y a | 1 réponse | 0

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Can you simulate multiple instances of matlab without actually opening matab multiple times?
Is this Possible? I know you can open multiple instances of matlab and run separate independent scripts on each, but is there an...

plus de 9 ans il y a | 1 réponse | 0

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Location of mex executable
I am trying to find the location of the mex executable for use with another program (madagascar). In order to use madagascar, it...

plus de 9 ans il y a | 1 réponse | 0

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How can i vectorize a matrix multiplication of higher dimension arrays?
I want to multiply a 6x6 matrix A and a 6x1 vector B at every grid point in a 3D earth model. Currently I am doing this: ...

presque 10 ans il y a | 2 réponses | 0

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How to load data from a location other than current directory
I would like to be able to load a .mat file from an arbitrary location that is not my currently selected folder. Example: dat...

plus de 10 ans il y a | 2 réponses | 2

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Suppress error warnings in matlab (when using parfor loop)
I am trying to supress a specific error message in one on my codes (specifically a "no start point" warning in a curve fitting f...

presque 11 ans il y a | 2 réponses | 2

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Pre-define some weights/phase using the fit function to fit a fourier series to data
I was able to figure this one out on my own. I created my own custom fitting function using the following code: w=1; Fou...

presque 11 ans il y a | 0

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Pre-define some weights/phase using the fit function to fit a fourier series to data
I am trying to decompose some data into a Fourier Series using the fit function, such that: f = fit(x,y,'fourier4') I woul...

presque 11 ans il y a | 1 réponse | 0

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