Hi All,
I am trying to get my head around using the command line vs using 'wavemenu' to process some signals. For convenience,I will provide same code using one of the datasets provided with MatLab.
The signal is quite different from what I am using, but hopefully this will make it easier for others to recreate/use the below code.
[C,L]=wavedec(sig,12,'db10');
[Ea, Ed] = wenergy(C, L);
The signals 'cD3' and those saved in my_VAR_1 are a different length when viewing the plots the pattern of change ifs clearly different.
Its fairly obvious that I don't really understand what the command [C,L]=wavedec(sig,12,'db10'); is doing. Therefore I am hoping someone can help with the following questions:
1.) What is the difference between the two approaches I have displayed above? 2.) When using the wenergy command, I understand the Ea output, but I do not get the Ed. Please can someone explain? I would like to be able to state how much energy is in each component of the signal as a percentage. The Ed values do not add up to the equivalent of Ea, so I am a tad confused. 3.) Once I have understood the above points, how can I estimate the approximate frequencies of each component?
I would to avoid the use of wavemenu so that I can automate the process to read multiple signals (I have further analysis to complete once I figured the above points out).
Thank you in advance for any help you can offer. Regards Dan
