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Good mind


Last seen: 4 years ago |  Active since 2016

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Question


How can i plot J(w)??
hello. I want to plot this equation (MSE), exactly as in the image. how i can?? w is a vector, is the st...

4 years ago | 0 answers | 0

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Question


My matlab doesn't work. what is the problem???
Please any help. when i want to use any think there is a problem; error error error . for example: First error Error: File: ...

5 years ago | 1 answer | 0

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Question


How can I implement this code several stages??
I want to compute 15 stages of the my output , my problem is in the second loop, is it correct?? i want to implement yi+1(n) = y...

5 years ago | 0 answers | 0

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Question


how can i get n desired number after the comma of my MSE?
i want 10 numbers after the comma? can i integrate any command in my code??

6 years ago | 1 answer | 0

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Question


what is the problem when running the code 2 times?
when i run my code i get the results(for example values of snr and mse), but when i run second time the same code and without ch...

7 years ago | 0 answers | 0

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answers

Question


how to deal with this error??
When i write the code i get **The variable'DG4' appears to change size on every loop iteration(within a script). Consider pre...

7 years ago | 2 answers | 0

2

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Question


how can i convert lib file to mat or m file?
hello, I brought ecg signals from private clinic. when i used import to a matlab file i thought i found them as *.mat*, unfort...

7 years ago | 0 answers | 0

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Answered
What is the difference between signal before wavelet decomposition and after reconstruction?
1. Increase the level and change the wavelet like db, bior, rbio... 2. add another step before reconstruct like thresholding ...

7 years ago | 0

Answered
How can I do denoising for ECG signal
*1.* thresholding function is applied only on details coefficients *2.* you can use another thresholding function as semi-sof...

7 years ago | 0

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Question


how to solve this pb?
well i am working in how to denoise a signal in power system with DWT i am loading a signal that i have denoised from wavemenu ...

7 years ago | 0 answers | 0

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Question


how to interpolate between 2 samples??
i want doing linear interpolation between 2 samples 170 and 230. how can i ?? load ecg.m; n=length(ecg); fs=360; ORS1...

7 years ago | 1 answer | 0

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Question


why i get 2 signals in the same plot?
this is the code to plot a signal loaded from physionet(MIT-BIH Arrhythmia database) but i get 2 signals in the same plot.what...

7 years ago | 1 answer | 0

1

answer

Answered
Can anyone help me with good reference books on Discrete Wavelet Transform?
*1.* Patrick Van Fleet-Discrete Wavelet Transformations_ An Elementary Approach with Applications-Wiley-Interscience (2008) *...

7 years ago | 0

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Answered
Are the filters used for wavelet decomposition the same for each level ?
of course, high pass and low pass. the best way to know that is by wavelet toolbox(user's guide,getting started)

7 years ago | 0

Question


how can i install new toolbox??
i download biosig4octmat-3.3.0.zip toolbox, then how can i install it or add it to the matlab(R2016b)?

7 years ago | 1 answer | 0

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Question


how can i plot 14 vertical lines at the same time??
i want plotting 14 vertical lines at the same time .is it possible?? load ecg.m; n=length(ecg); fs=360; t=0:1/fs:(n-1)...

7 years ago | 1 answer | 0

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answer

Question


what is the problem with 'wavedemo'???
Undefined function or variable 'wavedemo' i m working with R2016b, i have wavelet toolbox, and 'wavemenu' works normally

7 years ago | 1 answer | 0

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Question


how to plot vertical dotted line ??
i want plot vertical dotted line on the same figure(scale 25), at samples: 180 and 220 the length of my ecg is 2000?? loa...

7 years ago | 1 answer | 0

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Answered
is here any DSP expert to check my Discret Wavelet Transform code and respond my question please.
when using dwt or wavedec the length of each coefs is the half comparing with the original signal(because of downsampling), but ...

7 years ago | 0

Answered
Can I perform DWT without downsampling in MATLAB ?
you can use stationary wavelet transform, see wavelet toolbox user's guide page 3-68...

7 years ago | 1

Question


how to generate C code in matlab??
i have my C code(small part of my matlab code).but i dont know how to integrate it in matlab i'm working with matlab R2016b

7 years ago | 1 answer | 0

1

answer

Answered
Thresh value for Stationary Wavelet Transform Denoising 1-D
.you can refer to wavelet toolbox user's guide. .you can change threshold values depending in your details coeffs because thres...

7 years ago | 0

Question


how to deal with this error??
Error using - Matrix dimensions must agree. E=ecg-y; ecg is 2000x1 and y is 1x2000

7 years ago | 1 answer | 0

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Question


what are the functions of : non negative garrote, hyperbolic and semi soft in domain of wavelet thresholding in matlab
i want doing the wavelet thresholding as : ytsoft = wthresh(y,'s',thr)

7 years ago | 2 answers | 0

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answers

Question


How to deal with this error ??
Error using + Matrix dimensions must agree. *Error in (line 77) y= d1w + d2w + aa2; d1 and d2 are details coefficients a...

7 years ago | 1 answer | 0

1

answer

Answered
what are the functions of : non negative garrote, hyperbolic and semi soft in domain of wavelet thresholding in matlab
hyperbolic thresholding is the soft thresholding of squared details coefficients.

7 years ago | 0

| accepted

Question


is there fast quick select algorithn in matlab ??
i need calculate the median in each position of sliding window, to reduce the time needed to calculate this median i should use ...

7 years ago | 2 answers | 0

2

answers

Question


How to deal with this error??
A model of the surface EMG signal is created by filtering a white gaussian noise, using a shaping filter H(f). this filter has l...

7 years ago | 1 answer | 0

1

answer

Question


what is the correct formula of (sum of ...from...to...) in matlab
snrin=(-5:5:55); %initial snr N=length(ecg); % length of ecg signal n=(0:N-1);...

7 years ago | 1 answer | 0

1

answer

Question


how can i filtering white gaussian noise using shaping filter H(f)
i want filtering white gaussian noise using shaping filter h(f). what is the function of shaping filter in matlab

7 years ago | 1 answer | 0

1

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