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what is the unit of x axis in the wavelet toolbox?

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Baidehi Nanda
Baidehi Nanda on 1 Apr 2012
I am viewing a signal on the wavelet 1-d toolbox.The original signal has time in seconds on the x axis.But I cannot understand what the x axis is showing after wavelet transform is done on it.The Simulink help tells that the x axis can be either time or space,but the x axis values of the transformed signal are totally different from that of the original signal.No unit is mentioned.please help

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Answers (1)

Wayne King
Wayne King on 1 Apr 2012
This x axis has the same units as the input signal in time or space. However, if you are looking at the wavelet coefficients that result from a decimated wavelet transform, dwt, wavedec, then you have to realize that the spacing between those coefficients in time or space is proportional to the scale.

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