how to plot DWT wavelet coefficients with respect to time (in x axis)?

2 次查看（过去 30 天）
victor
victor 2014-11-4
编辑： Geoff Hayes 2014-11-10
consider a sample code:
u=inline('t>=0');
fs=3200; % sampling frequency
a=0.6;
t1=100;
t2=180;
t=0:8*10^-8:.1;
v1=sin(2*pi*(50/fs)*t);
v2=(1-a*(u(t-t1)-u(t-t2))).*sin(2*pi*(50/fs)*t);
signal2= v2.*v2;
[ca2,cd2]=dwt(signal2,'db4');
[c2,l2]=wavedec(signal2,2,'db4');
d2=wrcoef('d',c2,l2,'db4',2);
d1=wrcoef('d',c2,l2,'db4',1);
figure (1); plot(d2),title('Bus A, Scale 1');
figure (2); plot(d1),title('Bus B, Scale 1');
the fig 1 and fig 2 looks something like as show in the pic.
<<
<<
>>
>>
the x axis represent samples.but i want to plot dwt coefficients with respect to time. HOW CAN I DO THAT?
note: here i have generated v2, BUT actually i get this voltage data from simulink model. i take the fault bus voltage value, transform it into clarkes component, take a single component (like zero or alpha or beta) which represents my v2. i want to take wavelet coefficient of this v2 and plot it with respect to time so that i can calculate fault location. #fault location based on travelling wave using wavelet transform
hoping for a reply, thanking in advance :-)

请先登录，再回答此问题。

回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Discrete Multiresolution Analysis 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by