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William Rose


Con actividad desde 2007

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Respondida
How can I draw a bifurcation diagram of the logistic dynamical coupled logistic map lattice system in MATLAB?
@Harpreet, What have you done so far? Your function L(e) is the logistic map function, with r=3.99. You have not specified th...

5 días hace | 0

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Respondida
Violinplot extending beyond data range
@Angie, [Edit: add ylim() so that all 3 plots have same y-axis range.] You can vary the bandwidth, or the kernel function, or...

5 días hace | 0

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Respondida
How do I interpret the output from fftn? (performed on a 3D matrix: time x spatial dimension 1 x spatial dimension 2)
@Neil Bailey, When you compare the 2d FFT to the 3d FFT, you must view slices through the 3d FFT that correspond to the plane ...

5 días hace | 0

Respondida
Layered Damped Soil on Elastic Rock - Site Amplification in Kramer Book
@ibrahim can beziklioglu, You included two plots: a matlab-generated plot of Amplification factor as a funciton of frequency, a...

6 días hace | 0

Respondida
SNR vs Amplitude plot for ECG Lead
@Elzbieta, You have 21 amplitudes, 17 heart rates, and 8 leads (I, II, and V1 thorugh V6). That is a lot of combinations. I c...

8 días hace | 0

Respondida
Calculating calibration ECG device parameters
@Elzbieta, [edit: fix spelling mistakes] As you know, the MPS450 allows the user to specify various output waveforms. See tabl...

8 días hace | 0

Respondida
How to extract features from an ECG signal using ECGPUWAVE tool provided by physionet in MATLAB?
@Radu Stelu, ecgpuwave.m, here, is a matlab wrapper that calls an executable. there is additional info about ecgpuwave.m here. ...

8 días hace | 0

Respondida
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...

13 días hace | 0

Respondida
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...

19 días hace | 1

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Respondida
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...

25 días hace | 2

Respondida
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...

26 días hace | 0

Respondida
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,...

27 días hace | 0

Respondida
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...

28 días hace | 1

Respondida
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}) ...

29 días hace | 0

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Respondida
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...

alrededor de 1 mes hace | 0

Respondida
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...

alrededor de 1 mes hace | 1

Respondida
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...

alrededor de 1 mes hace | 0

Respondida
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...

alrededor de 1 mes hace | 1

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Respondida
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...

alrededor de 1 mes hace | 0

Respondida
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...

alrededor de 1 mes hace | 0

Respondida
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 ...

alrededor de 1 mes hace | 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. ...

alrededor de 1 mes hace | 0

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Respondida
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 ...

alrededor de 1 mes hace | 0

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Respondida
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 ...

alrededor de 1 mes hace | 0

Respondida
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...

alrededor de 1 mes hace | 0

Respondida
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...

alrededor de 2 meses hace | 0

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Respondida
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 ...

alrededor de 2 meses hace | 0

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

alrededor de 2 meses hace | 0

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Respondida
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 ...

alrededor de 2 meses hace | 1

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Respondida
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...

alrededor de 2 meses hace | 0

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