the axis in wavelet transform
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I change one signal from time domain to frequency domain after that I made WT for the signal I used db3 for 5 levels ... but I don't know x- axis refer to what ? and y- axis
refer to what ?
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Suraj Kumar
2025-3-18
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Hi Eva,
When you perform a wavelet transform (WT), such as the discrete wavelet transform (DWT) using the Daubechies wavelet ('db3') in MATLAB, the axes of the resulting wavelet coefficients matrix can be interpreted as follows:
1. X-Axis: Represents time points of the original signal or the index of data points in the coefficients matrix.
2. Y-Axis: Represents different scales or levels of wavelet decomposition, with lower levels showing high-frequency details and higher levels showing low-frequency approximations.
For more information on the discrete wavelet decomposition and visualization, you can refer to the MATLAB's wavedec function:
Hope this works for you!
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2025-3-18
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