functionwavCoef1
Extract the wavelet coefficients of a single level
Information
This function extracts the coefficients of a specified decomposition level from the data structure of the wavelet coefficients. This operation is useful if only the coefficients of a specific level are interested.
The definitions of the input parameters, c and len, are same as the function wavDec().
Refer to the section of wavelet Families for the detailed information about the available wavelets.
The default input values provide a quick example.
Inputs
| Type | Name | Default | Description |
|---|---|---|---|
| Real[:] | c | {-0.707, -0.707, -0.707, -0.7069999999999999, -0.707, -0.7069999999999999, 0.707, 0.0, -1.9993959999999997, -1.9993959999999997, 0.49984899999999993, -1.4135729719999994, 3.1805391869999995, 5.6542918879999995, 3.887325672999999} | Wavelet coefficients of all levels |
| Integer[:] | len | {13, 7, 4, 2, 2} | Lengths of coefficient vectors for all levels |
| Integer | level | 2 | The level to be reconstructed. 1..N are for the detail levels, where N is the maximum decomposition level. 1 stands for the most detail level (highest frequency). N+1 is for the approximation level. |
Outputs
| Type | Name | Default | Description |
|---|---|---|---|
| Real[:] | c1 | Extracted coefficients |