The examples provided in the documentation of following MATLAB Script function might use functions that are not available in MATLAB Script (e.g., plot, figure, subplot, wvtool, dfilt, fvtool, fdesign, RandStream). These examples are for illustration purposes and may not run successfully inside ...
plot, figure, subplot, wvtool, dfilt, fvtool, fdesign, RandStream). These examples are for illus...
x=0.7*sin(2*pi*50*t)+sin(2*pi*120*t);%原始信号 y=x+2*randn(size(t));%原始信号叠加了噪声后plot(Fs*t(1:50),y(1:50));%绘制波形title('原始信号+零均值随机噪声 ');xlabel('时间单位:ms'); 运行Matlab后,显示波形如下: 通过上面的截图,我们是很难发现波形中的频率成分,下面我们通过FFT...
This MATLAB function computes the discrete Fourier transform (DFT) of X using a fast Fourier transform (FFT) algorithm.
plot(Fs*t(1:50),y(1:50)); %绘制波形 title('原始信号+零均值随机噪声 '); xlabel('时间单位:ms'); 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 运行Matlab后,显示波形如下: 通过上面的截图,我们是很难发现波形中的频率成分,下面我们通过FFT变换,从频域观察就很方便了,Matlab运行代码如下: ...
% Plot the noisy signal in the time domain. It is difficult to identify the frequency components by looking at the signal X(t). figure(); plot(1000*t(1:50),X(1:50)) title('Signal Corrupted with Zero-Mean Random Noise') xlabel('t (milliseconds)') ...
MATLAB Online에서 열기 다운로드 This function plots the magnitude fft spectrum of the complex signals 인용 양식 Ufuk Tamer (2025).fftplot(https://www.mathworks.com/matlabcentral/fileexchange/70117-fftplot), MATLAB Central File Exchange. 검색 날짜:2025/4/29. ...
y=fft(relNums);y(1)=[];plot(y,'ro')xlabel('real(y)')ylabel('imag(y)')title('Fourier Coefficients')hold on 单独的傅里叶系数难以解释。计算系数更有意义的方法是计算其平方幅值,即计算幂。由于一半的系数在幅值中是重复的,因此您只需要对一半的系数计算幂。以频率函数的形式绘制功率谱图,以每年的...
plot(f,P1) title('Single-Sided Amplitude Spectrum of S(t)') xlabel('f (Hz)') ylabel('|P1(f)|') 高斯脉冲 在MATLAB 中尝试 尝试此示例 将高斯脉冲从时域转换为频域。 定义信号参数和高斯脉冲X。 Fs = 100;% Sampling frequency t = -0.5:1/Fs:0.5;% Time vector ...
Matlab软件 方法/步骤 1 在命令行窗口，输入如下命令：load sunspot.datyear = sunspot(:,1);relNums = sunspot(:,2);plot(year,relNums)title('Sunspot Data')如图1所示。2 按“Enter键”，得到Figure1。如图2所示。3 以下是前50年的近况。在命令行窗口，输入如下命令：plot(year(1:50),rel...