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FIR Parks-McClellan
You don't want to use spectrogram, use freqz() freqz(FR_SV,1) If you know the sampling frequency, you can input that as ...

alrededor de 14 años hace | 0

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Code for CorrCoef without using inbuilt function
The code for corrcoef is open for you to look at. Can't you use that as a basis for your implementation?

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align created random numbers in an array
Y = [0.3, 0.7, 0.8]; U = [0.1 0.2]; Y = cat(2,Y,U); or just Y = [Y,U]; So for example: N = [3 4 5]; ...

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trying to find peaks on a time series
Then please compare: x = [2 12 4 6 9 4 3 1 19 7]; [pks,locs] = findpeaks(x); % here is your code newx=zeros(lengt...

alrededor de 14 años hace | 0

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Wrong amplitude values after the FFT
The main issue you have is that you are only randomly sampling from a small set of frequencies and you are doing that 18 times, ...

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trying to find peaks on a time series
I'm assuming that xn in your loop above is the signal. You don't show us where xn comes from and it's not used in your call to f...

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Measure the degree of Periodicity
You can use the cepstrum. There is a technique called "cepstral peak prominence" that is used to analyze voice quality. The basi...

alrededor de 14 años hace | 1

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plot autocorrelation
x = randn(1000,1); % 1000 Gaussian deviates ~ N(0,1) y = filter([1 -1 1],1,x); % Create an MA(2) proce...

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Xcorr - plot correlation across time.
t = 0:0.001:1-0.001; x = cos(2*pi*100*t)+randn(size(t)); y = sin(2*pi*100*t)+randn(size(t)); [xc,lags] = xcorr(x,...

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How to extract a string name from a cell array and use it as name for a new variable?
Are you sure you want them to input the temperature as a string? A={'wind force', 'temperature', 'humidity'}; temp...

alrededor de 14 años hace | 0

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SNR in AWGN
With the syntax y = awgn(x,snr); You generate a white noise vector with a variance of variance = 10^(-snr/10); ...

alrededor de 14 años hace | 3

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Confused about num2str function
Hi, here is an example: for nn = 1:10, plot(randn(100,1)); title(['plot' num2str(nn)]); pause(0.5); end

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multiple periodograms
Just do [Pxx2,w] = pwelch(y2); Or any legal variable name. MATLAB variable names must start with a letter followed by ...

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no degree symbol
plot(randn(100,1)); title('360^\circ')

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Finding x for when y equals a certain value
Say x is your x-vector, and I'll let y be your pressure readings, would the following work? I'll make the threshold 2 in this ex...

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How to Compare the lengths of vectors
Not sure why you want to pad the DFT in this case, you end up not getting accurate frequency estimates by doing that. Fs = ...

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Error with atan?
As Walter states in his comment, I'm guessing you should use atan2() so you can tell the difference between (1,-1) and (-1,1) ...

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Matrix Filling
index = find(A(1,:) == 14); A = cat(1,A,zeros(1,size(A,2))); A(2,index) = 14; Added after Sean's point -- if the integer...

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error in thresholding
soft thresholding shouldn't change the total number of coefficients. What soft thresholding will do is to change the value of th...

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matrix indexing and creating a new matrix with new size
How about clear output For f = 1:nfiles IndexStart= RHs(RHs<peak); IndexEnd= RHs(RHs>peak); output{f} =...

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matrix indexing and creating a new matrix with new size
How about using a cell array? Beyond that I think you will need to give us a little MATLAB example to illustrate your issue.

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How to draw a discontinue function
t = 0:0.01:2*pi; x = cos(t); y = x; y(abs(x)>0.5) = 0.5; % to see the discontinuity stem(t(1:400),y(1:400)) ...

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Hi everybody, I have a question about coherence and mscohere function
The key thing for you is to choose a window length that allows you to ensure that your frequencies of interest fall directly on ...

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variable usage in function tf
Yes, the user will have to input some numeric value for K K = input('Enter your coefficient\n'); num = [K 1]; den ...

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How to get the row number of a row vector in a matrix
You can find the row with A =[ 1 1 2 2 2 3 3 3 4 3 ...

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p value of f test
If you use >>format long and display the p-value does it still say 0? What is your F value and what are the numerator ...

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Convert Time Domain Signal Data into Frequency Domain, How to handle the imaginary terms?
Then you are telling me that b = [42007935 111212895 184546560 238219725 238219725 184546560 111212895 42007935]; %...

alrededor de 14 años hace | 2

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Convert Time Domain Signal Data into Frequency Domain, How to handle the imaginary terms?
Then you want to use freqz() b = [3.91719822748777E-02, 0.103629842929331, 0.171922134825388, 0.221...

alrededor de 14 años hace | 2

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How do i add normal error to some ideal values ?
Assume x is your error-free data x = cos(pi/4*(0:99)); % now add the error, let the standard deviation be 2 x =...

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Convert Time Domain Signal Data into Frequency Domain, How to handle the imaginary terms?
You want to plot the magnitude and phase separately for the complex-valued data. Think of the polar form of a complex number. A ...

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