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Mathieu NOE


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Engineer - mechanics /electronics / signal processing Average matlab user for 20 years now. Professional Interests: signal processing, adaptive control, noise and vibration control

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Respondida
Up Chirp and Down Chirp Generation in a Single plot
hello well there is the documentation related to the chirp funtion, have you looked here ? chirp - Swept-frequency cosine - MA...

alrededor de 19 horas hace | 0

Respondida
Calculation of prinicple radii of curvature for given mathematical equation
hello see Fex : Curvature of a 1D curve in a 2D or 3D space - File Exchange - MATLAB Central once you have generated your x, ...

2 días hace | 0

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Respondida
RC circuit and its frequency response
still don't know if your method is valid , so I suggest mine (simply uses the same equations as a classical DFT) it's not 100%...

9 días hace | 0

Respondida
How do I choose the poles and zeros in order to calculate my TF from input & output data?
Hello @Olga my code is more oriented towards electronic filter's or mechanical system identification (with either chirp or rand...

18 días hace | 3

Respondida
How do I choose the poles and zeros in order to calculate my TF from input & output data?
hello there are those functions available to find minimal order realization for specific filters TF buttord – Minimum order ...

22 días hace | 1

Respondida
Removing ghost rings on CCD reading?
made a quick and dirty code just to see how far I could go without the Image procesing Tbx well, you may find that usefull or n...

alrededor de 1 mes hace | 0

Respondida
How do I turn off plot zooming when mouse is moved?
hello funny, I don't have this effect on my R2025a . Is it a matlab issue or a problem with your mouse ? either I use the alre...

alrededor de 2 meses hace | 0

Respondida
How can I make use of the full window size when zooming into very tall images?
hello you can try this : % Example data im=imread('cameraman.tif'); imtall=repmat(im,11,1); % size 2816 by 256 ims...

2 meses hace | 0

Respondida
Export plot with margins very close to edges
hello there are different options to modify the subplots margins : How do I decrease the margins around the subplots in my f...

2 meses hace | 0

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Respondida
FIR, band pass, band stop, high pass
hello your code is correct but gives some warnings : Warning: Matrix is close to singular or badly scaled. Results m...

2 meses hace | 0

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Respondida
Help with lumping of fatigue data
hello again seems to me you can make the code simpler , no need for for loops I still have a doubt about the omega units ? a...

2 meses hace | 0

Respondida
PID control simulation code improvement
hello minor suggestions - in my view , the code is supposed to reflect a real time implementation so data are only known up to...

2 meses hace | 0

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Respondida
msgbox body text does not show up
seems to me now you have to use strings (double quote) and no more char array this works for me (R2025a) h = msgbox("Calcula...

3 meses hace | 0

Respondida
Why does having only one row in table, break dot indexing?
hello why not simply ask : size(master_cell{i,9}) this works for all cases (see last iteration) demo : % create dummy mast...

3 meses hace | 0

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comment j'ecris et je delcare une matrice
Creating Matrices and Arrays - MATLAB & Simulink

3 meses hace | 0

Respondida
speeding up mpg video frame reading
seems to me the simplest change to gain speed is to remove this line : clear vidFrame I could get a speed increase of about 60%...

3 meses hace | 0

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How to design for decrement counter which should decrement from 500 to 0 using simulink blocks
hello simply make the difference between a constant (= 500) and a standard (rising) counter (0 to 500) the two blocks are t...

3 meses hace | 1

Respondida
using MATLAB to find area of flourescent region
hello this is a quick and dirty (potential) solution : that does not need the Image P Tbx generated by a non expert in th...

3 meses hace | 0

Respondida
Where to find image_ref.pdf file ?
I could find it here : Image Processing Toolbox Reference

3 meses hace | 0

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pcolor plot: how to scale the smoothing differently in x and y directions
hello maybe this - I opted to overlay the two peaks on the center position (which I admit is not exactly what was asked)... b...

3 meses hace | 0

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produce the figure similar to this one in Matlab
hello maybe this ? (a quick and dirty attempt ) the plot rendering may differ on your PC vs here below : groups = 3; % dat...

3 meses hace | 0

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Is there a way to extract the gray background from the image and just to keep the rainbow
hello here a quick answer - as I understand you want to extract the rainbow area from the entire picture . You can do a bounda...

3 meses hace | 0

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Respondida
Bode plot with right half plane zero
hello you can do this way : BTW , you pulstaion vector was huge and there is a better approach for Bode plots (as the x axis...

3 meses hace | 0

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M-File Errors when extracting a NetCDF data
hello I tested your code with another nc file I have on my pc and there seems to be no issue as soon as the m file and the nc ...

4 meses hace | 0

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Solved question video analysis
hello maybe this ? NB, this is a no Image Processing Tbx solution (as I don't have it) but I wanted to give it a try for the...

4 meses hace | 0

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help with a heat map
hello there are a couple of interesting Fex submission : special heatmap - File Exchange - MATLAB Central Matrix Visualizat...

4 meses hace | 0

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simulink time stop error?
I believe you should change the landing test force_b >0 should be more like : force_b <0.1 otherwise the output is true fo...

4 meses hace | 0

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I'm trying to come up with the workspace for my 3RRR pkm via discretization method. Solid edge is used to validate and code seems to be generating an overestimated workspace
hello I tried to reduce the error by using a more precise area computation aproach using polyarea I had to modify a bit your ...

4 meses hace | 0

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Making a table from data using rec
hello here you are what has changed q must be converted from table to array - use table2array for loop index needed a fi...

4 meses hace | 0

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Function output not displayed on scope.
hello again assuming dt = 0.02 is your application sampling rate and this is what we use in Simulink solver options (discrete ...

4 meses hace | 0

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