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13 Feb 2015 PIVMat 3.02 A PIV Post-processing and data analysis toolbox Author: Frederic Moisy

Frederic Moisy (view profile)

Frederic Moisy

Frederic Moisy (view profile)

Dear Adama, Emir, Chris,

Yes, Pivmat is compatible with Matlab 2014b. But it is not compatible with readimx 2.0 (not yet...) You need to install the previous release of readimx, which can be found here
http://www.fast.u-psud.fr/pivmat/

Sorry for the inconvenience
Frederic

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13 Feb 2015 PIVMat 3.02 A PIV Post-processing and data analysis toolbox Author: Frederic Moisy

Frederic Moisy (view profile)

Emir

Emir (view profile)

Hi,
is this version also compatible with Matlab 2014b?

On the website "http://www.fast.u-psud.fr/pivmat/" it says that it was tested up to R2013b, Matlab 8.1 but anyway i would like to ask you if anyone tried this on the actual version (2014b).

Thanks.

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12 Feb 2015 PIVMat 3.02 A PIV Post-processing and data analysis toolbox Author: Frederic Moisy

Frederic Moisy (view profile)

Adama creppy

Thank you Chris for your contribution, but it stills a problem. i've modified my matlab.sh to point to the proper location but what about the -desktop argument?
here is what is in my matlab.sh #!/bin/sh
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:.:$/home/acreppy/Desktop/Mes_dossiers/Mes_codes/Matlab_tools/readimx_v2.0_glnxa64/readimx.mexa64
exec /PRODCOM/bin/matlabr2013a

and i have this error message
Invalid MEX-file
'/home/acreppy/Desktop/Mes_dossiers/Mes_codes/Matlab_tools/readimx_v2.0_glnxa64/readimx.mexa64':
BufferCompact.so:cannot open shared object file: No such file or directory"

Can you help me?
thanks

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11 Feb 2015 LOGLOGPN LOGLOGPN is the same as LOGLOG, except that the Y data may have positive and negative values Author: Frederic Moisy

Frederic Moisy (view profile)

Ben Cipollini

loglogpn didn't work at all for me.
semilogxpn worked, but I don't really like the visualization, sorry!

2
10 Feb 2015 EzyFit 2.42 A free curve fitting toolbox for Matlab Author: Frederic Moisy

Frederic Moisy (view profile)

Elisabeth Bouchaud

Has anyone encountered this message error (using Matlab 2014b) :
"Error in efmenu (line 95)
if get(0,'CurrentFigure')"

Thanks for your help.

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06 Feb 2015 boxcount Fractal dimension using the 'box-counting' method for 1D, 2D and 3D sets Author: Frederic Moisy

Frederic Moisy (view profile)

Jon

Jon (view profile)

5
16 Dec 2014 PIVMat 3.02 A PIV Post-processing and data analysis toolbox Author: Frederic Moisy

Frederic Moisy (view profile)

Chris

Chris (view profile)

For those of you receiving an "Invalid MEX-file" error, you need to execute the following code:

> export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:.:$HOME/readimx

Alternatively, you can launch MATLAB using the included shell script (matlab.sh) in the readimx/tools folder. I had to modify mine to point to the proper location and include the -desktop argument.

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08 Dec 2014 EzyFit 2.42 A free curve fitting toolbox for Matlab Author: Frederic Moisy

Frederic Moisy (view profile)

Shubham

5
08 Dec 2014 EZFFT : An easy to use Power Spectrum (FFT) Computes/displays the power spectrum of a real time series Author: Frederic Moisy

Frederic Moisy (view profile)

Jiri

Jiri (view profile)

5
03 Dec 2014 EzyFit 2.42 A free curve fitting toolbox for Matlab Author: Frederic Moisy

Frederic Moisy (view profile)

Mathew

Mathew (view profile)

Many errors in Matlab 2014b, is there any fix coming?

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31 Oct 2014 EzyFit 2.42 A free curve fitting toolbox for Matlab Author: Frederic Moisy

Frederic Moisy (view profile)

Arkadiusz

Having some problems after upgrading Matlab to 2014b version. Following Olaf's sugegstions, some of the problems are solved (efmenu in figure), however still cannot do fit, returned error:

Error in pickdata (line 84)
x=co.XData;

Error in ezfit (line 210)
[x,y,h] = pickdata(fp);

Error in showfit (line 164)
f=ezfit(fun,varargin{2:end});

(The line numbers might have changed since I tried to investigate a bit the problem)

Anyone has seen the same issue ??

Arkadiusz

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29 Oct 2014 UIMAGE - UIMAGESC Display image with non-linearly spaced axis. Author: Frederic Moisy

Frederic Moisy (view profile)

Francesco

I suggest the following improvement: in the uimage.m file, when both X an Y are uneven, it is better to replace

for i=1:nx
for j=1:ny
indi = find(x<=xe(i));
indj = find(y<=ye(j));
ce(j,i) = c(indj(end), indi(end));
end
end

with

xi = zeros(nx,1);
yi = zeros(ny,1);
for i=1:nx
indi=find(x<=xe(i));
xi(i)=indi(end);
end
for j=1:ny
indj=find(y<=ye(j));
yi(j)=indj(end);
end
for i=1:nx
for j=1:ny
ce(j,i) = c(yi(j), xi(i));
end
end

Kind regards.

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22 Oct 2014 EzyFit 2.42 A free curve fitting toolbox for Matlab Author: Frederic Moisy

Frederic Moisy (view profile)

Olaf Bousche

Excellent tool. Needed a quick bug fix in 2014b:

in efmenu.m, replace everything with set(0,.. with set(groot,.. and get(0,.. with get(groot,... Also fixed line 95:

should be

if ~isempty(get(groot,'CurrentFigure'))

Replace everything with set(0,.. with set(groot,.. and get(0,.. with get(groot,... in other files as well

Olaf

5
21 Oct 2014 EzyFit 2.42 A free curve fitting toolbox for Matlab Author: Frederic Moisy

Frederic Moisy (view profile)

Mikhail

5
16 Oct 2014 UIMAGE - UIMAGESC Display image with non-linearly spaced axis. Author: Frederic Moisy

Frederic Moisy (view profile)

Peter Pablo

Dear Matt,
thank you for your suggestion. In order to remove the necessity of functions 'row' and 'col', the line 'ce = ...' should read:

ce = interp2(x,y,c,xe(:),ye(:)','nearest');

I can confirm that the speed for plot creation is increased by a factor of almost 500!!

(Tested using MATLAB 2014a)

5
19 Aug 2014 EzyFit 2.42 A free curve fitting toolbox for Matlab Author: Frederic Moisy

Frederic Moisy (view profile)

Galib

Galib (view profile)

Pretty impressive, but I will have to study it more to understand the way it converges differently for different seeds for y=Y_inf+(Y_0-Y_inf)exp(-t/Tau), where Y_inf is the seed.
Fernando Schlindwein

5
08 Aug 2014 PIVMat 3.02 A PIV Post-processing and data analysis toolbox Author: Frederic Moisy

Frederic Moisy (view profile)

Daniel

Daniel (view profile)

Not sure if this is the best place to ask: Has anyone had success intalling ReadIMX for Matlab 2013b on Ubuntu 12.04LTS? I have having problems which feel like they should be an easy fix: I get this error
"Invalid MEX-file '/home/daniel/Documents/MATLAB/readimx/readimx_v2_linux/readimx.mexa64': BufferCompact.so: cannot open shared object file: No such file or directory"

Does this mean it cannot locate the library or that something is out of date?

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08 Aug 2014 PIVMat 3.02 A PIV Post-processing and data analysis toolbox Author: Frederic Moisy

Frederic Moisy (view profile)

Daniel

Daniel (view profile)

Like some other have have previously commented here, I had the problem that I couldn't find the downloads>software link from lavision.de
The reason is that you have to register AND include the Davis software dongle number in your profile. This should automatically give you customer status and will have access to more services - if not automatically, all it takes is a message through lavision's contact form and they will upgrade your status (at the provision of a valid dongle key - which you can by the way find by opening your DaVis version Help>About: there you'll see the Donlge #).

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21 Jul 2014 RMVAR Remove variables from MAT-File RMVAR is a simple program that removes specified variable(s) from a MAT-File Author: Frederic Moisy

Frederic Moisy (view profile)

Leo Simon

Thanks for this, most useful.

I modified the file slightly, so that if the variable you tried to remove isn't actually in the matfile, then the program reports this but doesn't crash:

error(nargchk(2,inf,nargin));
WHOS = whos('-file',filename);
removeThese = {};
for ii=1:numel(varargin);
if isempty(strmatch(strvcat(WHOS(:).name),varargin{ii}));
disp([ varargin{ii} ' isn''t saved in ' filename ]);
else
removeThese = [ removeThese , varargin{ii} ];
end;
end;
vars = rmfield(load(filename),removeThese);
save(filename,'-struct','vars');

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09 Jul 2014 boxcount Fractal dimension using the 'box-counting' method for 1D, 2D and 3D sets Author: Frederic Moisy

Frederic Moisy (view profile)

Phumzile Mabuza

Hi, can I please ask how to get the boxcount or randcantor function, I am using 2014a student version and cannot find the functions. Where can Ii download from

please help!

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05 Jun 2014 UIMAGE - UIMAGESC Display image with non-linearly spaced axis. Author: Frederic Moisy

Frederic Moisy (view profile)

Matt Raum

Output is different from imagesc for nominally identical inputs.

sz=21;
noise=1e-6;
x=linspace(0,1,sz)+noise*randn(1,sz);
y=linspace(0,1,sz)+noise*randn(1,sz);
z=randn(sz);
figure;
imagesc(x,y,z);hline(y,'-k');vline(x,'-k');
figure;
uimagesc(x,y,z);hline(y,'-k');vline(x,'-k');

I was able to correct this and speed up the code significantly by using the following replacement for the general (~evenx && ~eveny) case:

nx = round(1 + (x(end) - x(1))/dx);
nx = min(nx, nmax);
xe = linspace(x(1), x(end), nx);

ny = round(1 + (y(end) - y(1))/dy);
ny = min(ny, nmax);
ye = linspace(y(1), y(end), ny);

ce = interp2(x,y,c,col(xe),row(ye),'nearest');

The functions 'col' and 'row' just turn one dimensional vectors into column and row vectors, respectively. A similar loop eliminating modification made to the other two cases will presumably speed them up as well.

Thanks Frederic!

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05 Jun 2014 PIVMat 3.02 A PIV Post-processing and data analysis toolbox Author: Frederic Moisy

Frederic Moisy (view profile)

Marta

Marta (view profile)

2
01 Mar 2014 UIMAGE - UIMAGESC Display image with non-linearly spaced axis. Author: Frederic Moisy

Frederic Moisy (view profile)

Anders

Anders (view profile)

perfect!

5
20 Feb 2014 boxcount Fractal dimension using the 'box-counting' method for 1D, 2D and 3D sets Author: Frederic Moisy

Frederic Moisy (view profile)

orlando chancay

Hi
I am Working with this method
I need to calculate the fractal dimension of lesions in the Brain but this are very smalls, size of lesions is( 7x5x8 ) , and the result of FD in this lesions is around 1.4 to 2,2, and do not understand why this result, would know that should is 2-3.

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15 Feb 2014 EzyFit 2.42 A free curve fitting toolbox for Matlab Author: Frederic Moisy

Frederic Moisy (view profile)

Jonathan

Having trouble getting the Ezyfit option on my figures. The tool is function within matlab, but not appearing in an interactive way on my figures. Matlab 2013b... Any help appreciated!

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10 Feb 2014 EzyFit 2.42 A free curve fitting toolbox for Matlab Author: Frederic Moisy

Frederic Moisy (view profile)

Qianqian Fang

Qianqian Fang (view profile)

  • 1 file
  • 425 downloads
  • 4.63158

for those of you who want to set a bound to the parameters, you may try the following patch:

fangq@wazu:~/space/Libraries/ezyfit$ diff ezfit.m.old ezfit.m
203a204
> bounds={};
240a242,244
> if nargin>4
> bounds={varargin{5:end}};
> end
548c552
< m=fminsearch(@fitlin, m0);
---
> m=fminsearchbnd(@fitlin, m0,bounds{:});
559c563
< m=fminsearch(@fitlog, m0); % bug fixed here! (v2.51)
---
> m=fminsearchbnd(@fitlog, m0,bounds{:}); % bug fixed here! (v2.51)

you will need to download the fminsearchbnd function from

http://www.mathworks.com/matlabcentral/fileexchange/8277-fminsearchbnd-fminsearchcon

and put the files under your matlab search path.

to set a bound, use

fitdata=ezfit(xdata,ydata,fun,p_ini,lb,ub);

where lb and ub are the lower/upper bounds, respectively, similar to those required by fminsearchbnd.

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25 Nov 2013 EzyFit 2.42 A free curve fitting toolbox for Matlab Author: Frederic Moisy

Frederic Moisy (view profile)

Kyle

Kyle (view profile)

James, Sara, Thierry and all others:

R2013b doesn't have the start button anymore. To install, get your path to ezyfit (setpath) and save it in the Environment tab. Then there is a hard coded problem in efmenu.m at line 212. The semi-colon should be a colon:

212 sufolder = strrep(userpath,':','');

5
13 Nov 2013 EzyFit 2.42 A free curve fitting toolbox for Matlab Author: Frederic Moisy

Frederic Moisy (view profile)

James

James (view profile)

Thierry NOVO, I never solved the problem. I had to stop using it. Too bad, I really liked it. I hope the issue is resolved soon.

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13 Nov 2013 EzyFit 2.42 A free curve fitting toolbox for Matlab Author: Frederic Moisy

Frederic Moisy (view profile)

Tina

Tina (view profile)

Hello,
I have a question: is there a way to force variables being smaller than a certain value or within an interval?

F.i. something like f=ezfit(x,y,'a/(1+exp(-b*(x-c)))+d;a=8&a>0;b<1&b>0;c=70;d=0'); (this of course does not work)

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25 Oct 2013 EzyFit 2.42 A free curve fitting toolbox for Matlab Author: Frederic Moisy

Frederic Moisy (view profile)

Thierry NOVO

James, I have the same issue when i try to install Ezyfit to Matlab R2012a. No start button and when i type efmenu install i obtain the same message like you.
Do you solve your installation problem

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19 Sep 2013 EzyFit 2.42 A free curve fitting toolbox for Matlab Author: Frederic Moisy

Frederic Moisy (view profile)

Jim Quirk

5
16 Sep 2013 EzyFit 2.42 A free curve fitting toolbox for Matlab Author: Frederic Moisy

Frederic Moisy (view profile)

Li

Li (view profile)

5
06 Sep 2013 EzyFit 2.42 A free curve fitting toolbox for Matlab Author: Frederic Moisy

Frederic Moisy (view profile)

Jose

Jose (view profile)

Excellent AND very functional software. How do you deal with Constants? I want to fix the value of one of the variables (use constants), however I haven't figured out how to do this.

5
05 Sep 2013 EzyFit 2.42 A free curve fitting toolbox for Matlab Author: Frederic Moisy

Frederic Moisy (view profile)

arnold

arnold (view profile)

I came up with my own solution for the problem with the equation box and subplots.

I used 'bordertext' from Jan de Wilde
http://www.mathworks.com/matlabcentral/fileexchange/41475-bordertext

Then I replaced the 'annotation' in EZfit's 'showeqbox.m' (last lines) against this:

hboxeq = bordertext( 'innertopleft', streq, '[orange]' );

[orange] is the standard color of ezfit and since 'bordertext' does not accept RGB colors, I just added this to the code myself which is very easy as well.

The result is a much cleaner eqbox, well, it isn't a box anymore. The positioning is relative to each axis. One can set background colors and everything else in 'bordertext' too.

Here's the result:
http://img6.imageshack.us/img6/2458/ymj9.jpg

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23 Aug 2013 EzyFit 2.42 A free curve fitting toolbox for Matlab Author: Frederic Moisy

Frederic Moisy (view profile)

Przemyslaw

5
19 Aug 2013 PIVMat 3.02 A PIV Post-processing and data analysis toolbox Author: Frederic Moisy

Frederic Moisy (view profile)

Carlos Reche

I have found a problem using readimx. I downloaded readimx.dll and readimx.m and installed it following the intructions. However, when I run loadvec I get an error which says:

??? Attempt to execute SCRIPT readimx as a function

I have seen that readimx.m has been not created as a function and it has only commented lines.
My versión of Matlab is 2010b 64-bit, but I have used this version of readimx before with other versions of matlab without any problem.

Can anybody help me??

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07 Aug 2013 EzyFit 2.42 A free curve fitting toolbox for Matlab Author: Frederic Moisy

Frederic Moisy (view profile)

Arnaud

Arnaud (view profile)

5
23 Jul 2013 UIMAGE - UIMAGESC Display image with non-linearly spaced axis. Author: Frederic Moisy

Frederic Moisy (view profile)

Gustaf Lönn

Very nice script! When using large matrices, panning and zooming is *much* faster with this script than with pcolor.

5
22 Jul 2013 EzyFit 2.42 A free curve fitting toolbox for Matlab Author: Frederic Moisy

Frederic Moisy (view profile)

arnold

arnold (view profile)

Gotta love it.

Sadly it doesn't get along with subplots at all. Does anybody have a solution for that?

5
17 Jul 2013 EzyFit 2.42 A free curve fitting toolbox for Matlab Author: Frederic Moisy

Frederic Moisy (view profile)

Enrico Fonda

5
12 Jun 2013 EzyFit 2.42 A free curve fitting toolbox for Matlab Author: Frederic Moisy

Frederic Moisy (view profile)

James

James (view profile)

When I run efmenu install, I get the following error:

===============
Error using fprintf
Invalid file identifier. Use fopen to generate a valid file identifier.
Error in efmenu>install_ef (line 248)
fprintf(fid,'%s\n','%STARTUP Startup file');
Error in efmenu (line 90)
install_ef;
===============
I have used ezyfit in prior versions of MatLab, and liked it very much. I am now using R2013a, and would like to use it again. Any suggestions?

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24 Apr 2013 EzyFit 2.42 A free curve fitting toolbox for Matlab Author: Frederic Moisy

Frederic Moisy (view profile)

arnold

arnold (view profile)

Hi,

can't get "efmenu" to work in startup file.
I always get this Warning when starting Matlab 2012b:

===========================
Warning: Executing startup failed in matlabrc.
This indicates a potentially serious problem in your MATLAB setup,
which should be resolved as soon as possible. Error detected was:
MATLAB:minrhs
Not enough input arguments.
> In matlabrc at 205
===========================

any ideas where this warning originates? Executing efmenu when matlab is already running works perfectly.

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11 Apr 2013 EzyFit 2.42 A free curve fitting toolbox for Matlab Author: Frederic Moisy

Frederic Moisy (view profile)

Bruce

Bruce (view profile)

So far, love it... An improvement suggestion, modify extrapolate (or add a user option) to not extrapolate in the Y dimension as well as the X.

and a "bug". If there are several subplots, and showfit is used on several of them, the equation boxes are all drawn in the upper left subplot, not in the relevant subplot.

Otherwise, love it!!!

4
25 Mar 2013 EzyFit 2.42 A free curve fitting toolbox for Matlab Author: Frederic Moisy

Frederic Moisy (view profile)

arnold

arnold (view profile)

very nice, thanks a lot!

How about adding conficence intervals at sigma or 2sigma surroundings? :)

4
21 Feb 2013 PIVMat 3.02 A PIV Post-processing and data analysis toolbox Author: Frederic Moisy

Frederic Moisy (view profile)

Hannah

Hannah (view profile)

Hi Hassan,
I am not sure if you found it already but you need to login to the LaVision website and then go to downloads and the file is under software->DaVis add ons.

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04 Feb 2013 boxcount Fractal dimension using the 'box-counting' method for 1D, 2D and 3D sets Author: Frederic Moisy

Frederic Moisy (view profile)

kinor

kinor (view profile)

Hi Frederic,

thanks for your submission, works really nicely.
to get if faster for 2D i propose instead of the inner loops:

c = c(1:2:end,1:2:end)|c(2:2:end,1:2:end)|c(1:2:end,2:2:end)|c(2:2:end,2:2:end);
n(g+1) = sum(c(:));

cheers
kinor

5
31 Dec 2012 EzyFit 2.42 A free curve fitting toolbox for Matlab Author: Frederic Moisy

Frederic Moisy (view profile)

Alexander Kosenkov

Very nice and easy-to-use tool! Thank you!

5
27 Dec 2012 PIVMat 3.02 A PIV Post-processing and data analysis toolbox Author: Frederic Moisy

Frederic Moisy (view profile)

Hassan

Hassan (view profile)

Hi,

I need ReadIMX / MatlabIMX from LaVision in order to import Davis files when using PIVMat. However, I can't find it on the LaVision website anywhere. It seems like they've taken it down, and I can't find it anywhere else. Can anyone point me in the right direction or provide a copy?

Thanks.

This was asked by Anthony on 12 Sep 2012 on the Questions/Answers section.

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07 Nov 2012 EzyFit 2.42 A free curve fitting toolbox for Matlab Author: Frederic Moisy

Frederic Moisy (view profile)

Frederic Moisy

Frederic Moisy (view profile)

Dear Razvan,
the definition of the coefficient R is given here: http://www.fast.u-psud.fr/ezyfit/html/ezfit.html

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07 Nov 2012 EzyFit 2.42 A free curve fitting toolbox for Matlab Author: Frederic Moisy

Frederic Moisy (view profile)

Razvan

Razvan (view profile)

Nice toolbox!
What exactly is the R coefficient that is displayed in the fit? Is this the same as R^2 from here: http://en.wikipedia.org/wiki/Coefficient_of_determination

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