## How do you plot a frequency sine wave in MATLAB?

MATLAB Sine Wave Plot

- fs= 500e3;
- f= 1000;
- nCyl=5;
- t=0:1/fs:nCyl*1/f;
- x=sin(2*pi*f*t);
- plot(t,x)
- title (‘Continuous sinusoidal signal’)
- xlabel(‘Time(s)’);

## How do you create a frequency signal in MATLAB?

Direct link to this answer

- f = 3000;
- N = 1000; % number of samples in signal.
- fs = 1e4; % sampling rate.
- x = sin(2*pi*f*(0:N-1)/fs);

**How do you write a sin function in MATLAB?**

Y = sin( X ) returns the sine of the elements of X . The sin function operates element-wise on arrays. The function accepts both real and complex inputs. For real values of X , sin(X) returns real values in the interval [-1, 1].

### How do you find the frequency component of a signal in MATLAB?

The Fourier transform of the signal identifies its frequency components. In MATLAB®, the fft function computes the Fourier transform using a fast Fourier transform algorithm. Use fft to compute the discrete Fourier transform of the signal. y = fft(x);

### How do you calculate the frequency of a signal?

This frequency definition leads us to the simplest frequency formula: f = 1 / T . f denotes frequency and T stands for the time it takes to complete one wave cycle measured in seconds. The SI frequency unit is Hertz (Hz), which equals 1/s (one cycle per second).

**Why FFT is used in MATLAB?**

The fft function in MATLAB® uses a fast Fourier transform algorithm to compute the Fourier transform of data. Consider a sinusoidal signal x that is a function of time t with frequency components of 15 Hz and 20 Hz.

## How do you write sin 2x in MATLAB?

Direct link to this answer

- x=0:0.01:2*pi;
- si=sin(x).^2;
- co=cos(x).^2;
- plot(x,si,x,co);
- figure;
- plot(si,co);%not sure which one you want.

## How do you create a sinusoidal signal in MATLAB?

⋮

- fs = 512; % Sampling frequency (samples per second)
- dt = 1/fs; % seconds per sample.
- StopTime = 0.25; % seconds.
- t = (0:dt:StopTime-dt)’; % seconds.
- F = 60; % Sine wave frequency (hertz)
- data = sin(2*pi*F*t);

**How do you find the frequency spectrum of a signal in Matlab?**

How to plot the frequency spectrum of a signal on Matlab?

- clear all;clc.
- Fs = 200; % Sampling frequency Fs >> 2fmax & fmax = 50 Hz.
- t = 0:1/Fs:7501; % length (x) = 7501.
- x = 50*(1+0.75*sin(2*pi*t)).*cos(100*pi*t); % AM Signal.
- xdft = (1/length(x)).*fft(x);
- freq = -100:(Fs/length(x)):100-(Fs/length(x)); %Frequency Vector.

### How do you calculate FFT frequency?

Let X = fft(x) . Both x and X have length N . Suppose X has two peaks at n0 and N-n0 . Then the sinusoid frequency is f0 = fs*n0/N Hertz….

- Replace all coefficients of the FFT with their square value (real^2+imag^2).
- Take the iFFT.
- Find the largest peak in the iFFT.

### What is frequency Fourier transform?

A Fourier transform (FT) is a mathematical transform that decomposes functions depending on space or time into functions depending on spatial frequency or temporal frequency.