Rank: 66 based on 3382 downloads (last 30 days) and 14 files submitted
photo

Frederic Moisy

E-mail
Company/University
University Paris Sud
Lat/Long
48.70661, 2.1769

Personal Profile:

Visit my Matlab page: http://www.fast.u-psud.fr/~moisy/ml

Professional Interests:
Fluid mechanics, Image processing

 

Watch this Author's files

 

Files Posted by Frederic View all
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  • 14
Updated   File Tags Downloads
(last 30 days) 		Comments Rating
02 Sep 2009 Screenshot PIVMat 1.90 A PIV Post-processing and data analysis toolbox Author: Frederic Moisy davis, velocimetry, import, lavision, data import, export 224 6
  • 4.0
4.0 | 1 rating
02 Sep 2009 FileSeries - Rename / renumber files, recursive directories Renaming and renumbering for series of files ; generalize the use of wildcards (*) for CD, LS ... Author: Frederic Moisy directories, path, recursive directory r..., files 269 2
  • 4.5
4.5 | 2 ratings
05 Feb 2009 Published M-Files EzyFit 2.30 A free curve fitting toolbox for Matlab Author: Frederic Moisy curve, fit, vetor creating in wor..., fitting, interpolation, vectorise the columns... 359 50
  • 4.81818
4.8 | 57 ratings
20 Nov 2008 Screenshot EZFFT : An easy to use Power Spectrum (FFT) Computes/displays the power spectrum of a real time series Author: Frederic Moisy fft, hann, energy spectrum, power spectrum, signal processing 275 1
10 Jul 2008 Published M-Files boxcount Fractal dimension using the 'box-counting' method for 1D, 2D and 3D sets Author: Frederic Moisy fractals, dimension, mathematics, fractal, boxcounting 285 13
  • 4.125
4.1 | 9 ratings
Comments and Ratings by Frederic View all
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  • 5
Updated File Comments Rating
30 Oct 2009 boxcount Fractal dimension using the 'box-counting' method for 1D, 2D and 3D sets Author: Frederic Moisy

Dear Marian
Please use my email address for questions or discussions about this submission. Algorithms to compute a fractal dimension (box-counting or other methods) are all approximations, which converge towards the "true" topological dimension in the limit of large scale separation. I hope this helps. - F.
29 Oct 2009 boxcount Fractal dimension using the 'box-counting' method for 1D, 2D and 3D sets Author: Frederic Moisy

Dear Marian,
What does it mean "the program crashes"? Please provide an example. If I make the simplefollowing test to compute the "fractal" dimension of a square,
   a=zeros(4096,4096);
   a(600:800, 1200:1400)=1;
   boxcount(a,'slope')
it works properly (dimension close to 2 for small r, and close to 0 for large r, as expected)
F.
23 Oct 2009 EzyFit 2.30 A free curve fitting toolbox for Matlab Author: Frederic Moisy

Dear Andres,

Problem #1: This occurs if y and dy are column vectors instead of row vectors. If this is the case, then just replace [y; dy] by [y, dy]

Problem #2: Move the equation box using the mouse.

-- The author
12 Dec 2008 EzyFit 2.30 A free curve fitting toolbox for Matlab Author: Frederic Moisy

(Sorry for the unintentional rating of my own file on my previous post!)

TO UNINSTALL THE EZYFIT TOOLBOX:
1. Edit the 'startup.m' file (type 'edit startup') and remove the 2 lines starting with 'efmenu' and 'fprintf()'
2. Go the menu 'File', 'Set Path', and remove the directory 'ezyfit'
3. Restart Matlab

CONCERNING THE ISSUE OF THE EZYFIT MENU IN SAVED FIGURES AND GUIs:
Sorry for this bug, I have no idea on how to fix it. Suggestions are welcome. Note that you can use the Ezyfit toolbox without using the Ezyfit menu. For this, apply step 1 above.

Hope this helps - The author.
12 Dec 2008 EzyFit 2.30 A free curve fitting toolbox for Matlab Author: Frederic Moisy

Comments and Ratings on Frederic's Files View all
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  • 138
Updated File Comment by Comments Rating
02 Nov 2009 boxcount Fractal dimension using the 'box-counting' method for 1D, 2D and 3D sets Author: Frederic Moisy Axente, Marian

moisy.nospam@fast.u-psud.fr bounces me every time...
30 Oct 2009 boxcount Fractal dimension using the 'box-counting' method for 1D, 2D and 3D sets Author: Frederic Moisy Moisy, Frederic

Dear Marian
Please use my email address for questions or discussions about this submission. Algorithms to compute a fractal dimension (box-counting or other methods) are all approximations, which converge towards the "true" topological dimension in the limit of large scale separation. I hope this helps. - F.
30 Oct 2009 boxcount Fractal dimension using the 'box-counting' method for 1D, 2D and 3D sets Author: Frederic Moisy Axente, Marian

Sorry...you are right. One more question in light of my fractal inexperience: why is the algorithm not give a full topological dimension whenever we put a square or a cube as input? Rather it gives 1.96 or 2.9. I thought that for smooth manifolds, the fractal dimension is equal to the topological dimension. Is there an approximation somewhere, or how could I modify your code to get a full 3 for a cube input?
29 Oct 2009 boxcount Fractal dimension using the 'box-counting' method for 1D, 2D and 3D sets Author: Frederic Moisy Moisy, Frederic

Dear Marian,
What does it mean "the program crashes"? Please provide an example. If I make the simplefollowing test to compute the "fractal" dimension of a square,
   a=zeros(4096,4096);
   a(600:800, 1200:1400)=1;
   boxcount(a,'slope')
it works properly (dimension close to 2 for small r, and close to 0 for large r, as expected)
F.
26 Oct 2009 boxcount Fractal dimension using the 'box-counting' method for 1D, 2D and 3D sets Author: Frederic Moisy Axente, Marian

Hi Frederic

Could you point me in the right direction about your boxcounting algorithm? If I put a cube as input the program crashes; I thought that it was an easy way to check for consistency of the results.
Top Tags Applied by Frederic
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graphics, plotting, specialized, development environment, directories
Files Tagged by Frederic View all
  • 1 - 5 of
  • 14
Updated   File Tags Downloads
(last 30 days) 		Comments Rating
02 Sep 2009 Screenshot PIVMat 1.90 A PIV Post-processing and data analysis toolbox Author: Frederic Moisy davis, velocimetry, import, lavision, data import, export 224 6
  • 4.0
4.0 | 1 rating
02 Sep 2009 FileSeries - Rename / renumber files, recursive directories Renaming and renumbering for series of files ; generalize the use of wildcards (*) for CD, LS ... Author: Frederic Moisy directories, path, recursive directory r..., files 269 2
  • 4.5
4.5 | 2 ratings
05 Feb 2009 Published M-Files EzyFit 2.30 A free curve fitting toolbox for Matlab Author: Frederic Moisy curve, fit, vetor creating in wor..., fitting, interpolation, vectorise the columns... 359 50
  • 4.81818
4.8 | 57 ratings
20 Nov 2008 Screenshot EZFFT : An easy to use Power Spectrum (FFT) Computes/displays the power spectrum of a real time series Author: Frederic Moisy fft, hann, energy spectrum, power spectrum, signal processing 275 1
10 Jul 2008 Published M-Files boxcount Fractal dimension using the 'box-counting' method for 1D, 2D and 3D sets Author: Frederic Moisy fractals, dimension, mathematics, fractal, boxcounting 285 13
  • 4.125
4.1 | 9 ratings
 

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