William Rose

Actif depuis 2007

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How to modify the filter to match the power output of the wind turbine with the wind speed?
@jana nassereddine, The horizontal axis labels and values are partly cut off, or absent, on the three images you uploaded which...

environ 20 heures il y a | 0

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Increasing value over time of Power of a audio signal
@Alex Kouroupis, You say "I need to calculate the power myself cause i need the values for a model". The first plot you pro...

7 jours il y a | 1

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Compare probability density functions of 2 vectors
@T.C., [Edit: fix error in my code below.] The 2 sample Kolmogorov-Smirnov test. x1=rand(1,50); x2=rand(1,40); [h,p]=kstest...

13 jours il y a | 2

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MLS(moving least squares) algorithm problem... help me!!!
@종영, In your comment you refer to "cubic spline function". Cubic splines for smoothing can be done with csaps(). The code be...

14 jours il y a | 0

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Handling Multiple UTM Zones for Azimuth and Elevation Calculations in MATLAB
@Lidor, if I had to compute azimuth and distance for locations specified across multiple UTM zones, I would just convert to lat,...

14 jours il y a | 0

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Input for ARfit ? (EEG analysis)
@Annaëlle, [Edit: fix spelling.] Have you run the script ardem.m, which is part of the ARfit toolbox? Does it produce reason...

16 jours il y a | 1

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Plot the tidal ellipses for the four major tidal constituents
@은진, The line idx = find(strcmp(NAME, major_constituents{i})); does not work, because strcmp(NAME, major_constituents{i}) ...

16 jours il y a | 0

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2D Fourier transform- problems with the shift
@nathan blanc, Reconstructing the 2d DFT is a little tricky. The attached script uses the Nk largest components of the 2d DFT t...

20 jours il y a | 0

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My MATLAB psgnifit code is calculating the wrong values from the plot and I am unable to resolve it. Please help.
@Adithi Anil, I have not tried running your code. I notice that gamma=0; % lower symptote, supposedly lambda=10; % upper sympt...

22 jours il y a | 1

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Why does the phase response get cutoff beyond a frequency?
Check the values returned by freqz. Answering on my cellphone so I’m limited in what I can do. Look for NaNs at high frequencies...

22 jours il y a | 0

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quaternion kinematic formulation in attitude dynamics block does not seem to be complete.
@Gökhan, I think you are correct. A factor of (-1/2) should multiply the right hand side matrices in the equation here for the...

23 jours il y a | 1

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Why is my MATLAB video such poor quality?
@Walter Roberson, thank you for the link fix. [Edit: fix spelling.] @Mitchell Tillman, I would definitely explore the possibi...

24 jours il y a | 0

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A problem about subcarrier spacing of ofdm
@lc, The error you report is because the variable x has not been defined. You will need to provide more context in order to re...

26 jours il y a | 0

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Estimating Initial Delay Values for NARX System Outputs in Real-World Applications
@Sandeep, To get an initial estimate for delay, I would compute the cross correlation of the input and the output. If you are ...

27 jours il y a | 0

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Understanding AIC Values for Best Model
@Alyssa, Those negative AICs should be positive. Simple interpretation is to take the model with the lowest (positive) AIC. ...

27 jours il y a | 0

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Dynamic contrast agent in MRI
@MARINA, [Edit: fix spelling.] I have worked with MRI images, but not with perfusion images. I have also worked with fitting ...

28 jours il y a | 0

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Question on surface plotting (beginner)
@Young Chan Jung, A file of simulated AFM scan data is attached, with X,Y,Z in columns 1,2,3. I assume you will know how many ...

29 jours il y a | 0

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Counting orbits taken by a satellite
@Aditya, [Edit: fix typos. No changes to code.] If you explain your data, you are morelikely to receive useful assistance. Yo...

29 jours il y a | 0

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how to visualize the EEG functional connectivity data with circularGraph?
@Elaine, See if your issues have been addressed among the 36 existing Discussions on the File Exchange page, here (click the di...

environ un mois il y a | 0

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converting txt file to mat file; ads1298ecgafe-pdk
@Elzbieta, [Edit: Spelling. No changes to code.] The numeric data in your text file includes only 10 rows. Assuming each row ...

environ un mois il y a | 0

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Kalman filter 2d
@kalmanfilterlearner, [Edit: Fix spelling.] I modified your script to make it simpler. See attached file. To be specific, I r...

environ un mois il y a | 0

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Why does frequency of complex exponential doubles when frequency increases?
@Clement, [Edit: Fix spelling mistakes; no changes to equations or to code.] your code is good. The unexpected result is due ...

environ un mois il y a | 1

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Peaks and Valleys of Noisy, Increasing Sinewave
@kjb, [Edit: fixed spelling error and incorrect high frequency cutoff value in my description. Code is not changed.] orig_dat...

environ un mois il y a | 0

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Nondimentionalize the 2 DOF equations
@Yu, The two diagrams in your recent comment are helpful. You say in your recent comment "I define x2 as the relative displacem...

environ un mois il y a | 0

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Nondimentionalize the 2 DOF equations
@Yu, You are smart to add Sam Chak's name. He is a great and smart source of analysis and help. There is more than one way you...

environ un mois il y a | 1

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Is there a way to determine an equivalent circuit for Nyquist diagrams (I have the data set) using Matlab (or Simulink)?
@Arthur FdA, Yes you can. The experimental data needed for Nyquist and Bode plots is the same: a set of magnitudes and phases,...

environ 2 mois il y a | 1

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Improving personal Fourier Interpolation Model
@Giacomo, I do not understand everything you are doing in your script. But it looks lto me like you discard the phase informat...

environ 2 mois il y a | 0

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how do i get a proper time plot for this qudratic equation?
@Pranay, Let us try different initial values for x: x0=[-2,...,2]. Use a different initial value on each pass. Store results i...

environ 2 mois il y a | 0

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How to properly make a circular histogram?
@Neuroesc, Check out these items on the file exchange: https://www.mathworks.com/matlabcentral/fileexchange/65174-wind_rose-wi...

environ 2 mois il y a | 0

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Create (equal density) spaced vector in MATLAB
[Sorry if this is a duplicate answer. My first attempt to post produced an error message.] @Abinesh G, Here are command that w...

environ 2 mois il y a | 0

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William Rose

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