ylabel('Amplitude'); % label y-axis X,Y轴都搞定了,赶紧表上X,Y label,美美哒 当然我们还有最大的问题没有解决,明明是2Hz的信号怎么右面还有一个对称的?。。这个你就别问了,蜜汁数学。通常我们只取前面一半就好: %plot first half of data plot(f(1:hpts),sfft_mag_scaled(1:hpts)); xlabel('Fre...
下面是我正在尝试的一个例子: import numpy from scipy.signal import find_peaks test = numpy.random.uniform(0.8, 1.0, 20) plt.plot(test) ? 然后,我尝试了find_peaks(test,width=3),输出的一部分如下所示 array([ 6, 12]) 'left_bases': array([0, 8]), 'right_bases': array(...
xlabel('Frequency (Hz)'); ylabel('Amplitude'); % 调整图形显示 sgtitle('Amplitude Modulation'); % 显示图形 grid on; 图形如下: img 先别急,我们再看看别的波形调幅 1.2 试验二:三角波调幅 % 参数设置A_c=3;% 载波幅度f_c=2000;% 载波频率M=1;% 调制幅度f_m=50;% 调制频率Fs=20000;% 采样...
4、将信号发生器(Signal Generator)与示波器(Scope)在>处用线连起来。并双击信号发生器(Signal Generator),在波形Wave Form处选择锯齿波sawtooth,在振幅Amplitude处输入1,在周期Frequency处输入10,然后点击应用Apply和Ok即可。5、在模型model的导航栏点击运行的三角形按钮,模型仿真就开始运行。6、双...
%Here is a demonstration of how it works using a sin wave: function [TgOnset,TgMid] = GlassTransitionFunc % Define sine wave parameters t = 0:0.01:1; % time vector f = 1; % frequency of sine wave A = 1; % amplitude of sine wave ...
%MATLAB program to find the IDFT of a random sequence%Createa sample random sequenceinfrequency domainN=200;%Lengthof the sequenceX=randn(1,N)+1i*randn(1,N);%Randomsequenceinfrequency domain%Calculatethe inverse discreteFouriertransformx=ifft(X);%Reconstructingthe original sequence%Creatinga time...
meanError_Swave = mean((noisyECG_withTrend(locs_Swave) - val_Swave)) meanError_Swave = 0.1844 这表明,为了进行高效的峰值分析,必须对含噪信号进行去趋势。 峰值属性 一些重要的峰值属性包括上升时间、下降时间、上升水平和下降水平。为 ECG 信号中的每个 QRS 复波计算这些属性。下图显示这些属性的平均...
Attempting to generate a sine function with several different amplitude epochs withinf the same trace. For example, a 2Hz sine wave at amplitude 1 for 10 seconds, amplitude 10 for ten sceonds, then back to amplitude 1 for another ten seconds. I tried editing the example here: http://www...
The above code declares a threshold of 1, the amplitude of the input being 5, followed by specifying a sinusoidal frequency, and a time vector from 0 to 0.5 seconds in steps of 0.001. Next, we generate a sinusoidal signal, then generate the saturated wave with the threshold in use. We ...
There are many ways , either by using the software or using Electronic devices , and by the way take a look at this Mathw(c) Example that illustrates :The Fourier series expansion for a square-wave altough this method has the disadvantage of Gibbs effect :