I need to analyze a set of recorded data using wavelet transform from an accelorometer which include four variables, time and three axis (x, y , z). ps.(newb in MATLAB).

This a sample of the data.

Answer 1

[Meet]

Hi Alcatraz,

To analyze a set of recorded data from a file you could follow these steps:

1. Import the ".mat" file containing accelerometer data into MATLAB.
2. Extract the relevant columns for each axis from the loaded data.
3. Select an appropriate wavelet type (e.g., Daubechies, Symlets) and decide on the level of decomposition.
4. Apply the wavelet transform to each axis using MATLAB's wavelet functions. This step involves decomposing the signal into approximation and detail coefficients.
5. Reconstruct the signal from the wavelet coefficients to analyze specific frequency components or noise levels.

To know more about each of the above steps, you could refer to the below documentation links:

1. https://www.mathworks.com/help/matlab/ref/load.html
2. https://www.mathworks.com/help/wavelet/getting-started-with-wavelet-toolbox.html
3. https://www.mathworks.com/help/wavelet/ref/wavedec.html
4. https://www.mathworks.com/help/wavelet/ref/waverec.html

Hope this helps!!