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How do ı calculate the harmonics by inspecting the signal in matlab?
dt = t(2) - t(1); Fs = 1/dt; pwelch(gf,[],[],[],Fs);

fast 12 Jahre vor | 0

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How to apply time reversal convolution?
Yn = conv(Hn,Xn);

fast 12 Jahre vor | 0

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Reflecting impulse response with respect to y-axis
n = -3:0; h = fliplr(Hn); stem(n,h);

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How do I plot this to display a spectrum?
x = wavenumber; y = transpose(squeeze(ref_raw)); plot(x,y);

fast 12 Jahre vor | 0

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Help for AND circuit
Please type xInitial = 0; at the MATLAB command prompt, and then try running the model. That should eliminate the er...

fast 12 Jahre vor | 0

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FFT is off by 0.4 dB; How can I account for this in my code?
* <http://www.mathworks.com/help/signal/ref/periodogram.html periodogram> * <http://www.mathworks.com/help/signal/ref/pwelch....

fast 12 Jahre vor | 0

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How can I graph an equation with 'changing constant' values?
Equation = @(x,y) Constant + 10 + 90*(x>=3) + 900*(x>=6) + 5.*x + 5.*y;

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Help with Vectors and For Loops and determining whether it's negative or positive?
doc for doc numel doc size docsearch('"logical indexing"') doc false doc true docsearch('"preallocating ar...

fast 12 Jahre vor | 0

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Why does FFT subtract PI/2 phase shift for sine wave
Think of it this way. Cosine is the real-part of the complex exponential, whereas sine is the real-part of the complex exponent...

fast 12 Jahre vor | 2

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FFT function in matlab
Neither. It is a straight implementation of the definition of the DFT. Depending on how you choose to scale the result, you ca...

fast 12 Jahre vor | 0

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Is there a way to display(or know), whether the signal flowing through a line in a simulink model is complex or real ?
* <http://www.mathworks.com/help/simulink/ug/working-with-data-types.html#f14-90571 Display Port Data Types> * <http://www.math...

fast 12 Jahre vor | 1

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generating a half wave sinusoid using Simulink
Try feeding the output of the *Sine Wave* block to the input of a *<http://www.mathworks.com/help/simulink/slref/saturation.html...

fast 12 Jahre vor | 0

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Creating a matrix of sinusoids with frequency increasing over columns and time increasing over rows
Fs = 48000; dt = 1/Fs; t = (0:dt:0.25-dt)'; Fc = 60*(1:2:15); y = sin(2*pi*t*Fc);

fast 12 Jahre vor | 1

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What are new things in error-control coding functions in R2014a? I am using R2011b now.
Please review the <http://www.mathworks.com/help/comm/release-notes.html Release Notes> for the Communications System Toolbox

fast 12 Jahre vor | 0

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Creating a simple plot
Use |.*| instead of |*| here: y = x.*exp(-x.^2); Also, you will want higher resolution: x = -3:0.01:3;

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define frequency of signal from fft output
Please try: Fs = 1000; dt = 1/Fs; N = 12000; t = dt*(0:N-1)'; x = sin(100*pi*t) + 2*cos(200*pi*t); X =...

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define frequency of signal from fft output
dF = Fs/N; f = dF*(0:N-1)';

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Why do many MATLAB examples model stock price returns instead of absolute changes?
Suppose you own a portfolio containing two stocks, with a total value of $5,000 each. Suppose further that the price of one sto...

fast 12 Jahre vor | 0

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Hi! can you guide me to plot power spectra of ASK signal?
Here's a start: Tb = 1; % seconds per bit R = 1/Tb; % bits per second M = 100; % bi...

fast 12 Jahre vor | 0

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How can i implement fft on sine wave then plot it ?
doc sin doc cos doc fft doc fftshift doc abs doc plot doc stem

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Using iirnotch for more than one frequency?
Fs = 960; Fc = [ 120 240 ]; Wc = Fc/(Fs/2); BW = Wc/35; mycomb = zeros(2,6); [b,a] = iirnotch(Wc(1),BW(1)...

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i want to know frequency from amplitude of an EEG
doc pwelch doc spectrogram

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Comb filter to remove noise?
|<http://www.mathworks.com/help/dsp/ref/iirnotch.html iirnotch>|

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1D Fourier Transform for square pulse
doc zeros doc ones doc fft doc imag doc real doc plot

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A script that writes all even numbers from 1 to 100
In addition to doc for doc while please try doc linspace and doc colon

fast 12 Jahre vor | 1

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MATLAB HELP to write a function.
Here's a start: x = pi/4; ideal = cos(x); approx = 1; k = 0; while ( abs(approx - ideal) > ... ) ...

fast 12 Jahre vor | 1

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How to change scatter plot fonts
set(h1,'marker','*'); set(h2,'marker','+');

fast 12 Jahre vor | 2

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Combining 2 signals into 1
Please try: plot(n,xn,n,ns); For more info: >> doc plot

fast 12 Jahre vor | 0

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Strings ASCII and character mapping Questions
doc char doc uint8

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Fourier transform with both time vector and data vector
doc pwelch

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