# Questions tagged [ssqueezepy]

Synchrosqueezing, wavelet transforms, and time-frequency analysis in Python.

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### ICWT filtering signal with a cut-off frequency

In ssqueezepy, by finding a certain scale is it possible to do an icwt only for the scales above (or bellow) ? For exemple if I have a double sin (with $f_1$ and $f_2$), by taking the frequency $f_c$ ...
39 views

### Zeroing input frequencies to improve inverse CWT

This is a follow up of my previous question Why is inverse CWT inexact / inaccurate? Rephrasing its accepted answer in my own words: The filterbank's transfer function gives information on what band ...
1 vote
204 views

### Why is inverse CWT inexact / inaccurate?

I'm all new to wavelet analysis. I'm trying to get a working understanding of the continuous wavelet transform and its inverse. By "working understanding", I really mean "getting some ...
1 vote
169 views

### What do computed CWT frequencies and color values correspond to?

I wanted to make wavelet transform and represent the frequencies as function of time instead of the scale of the wavelet as function of time. This example that uses ...
209 views

### Why are wavelet transforms implemented in Python/Matlab often called Continuous wavelet transform when they take discrete-time input?

The implementations of Synchrosqueezing wavelet transform in Python (ssqueezepy) and MATLAB both write in their documentation that they implement the synchrosqueezing algorithm on the Continuous ...
248 views

### Inverse continuous wavelet transform, how to obtain fluctuations at a given scale with ssqueezepy?

How can I obtain the fluctuations of a timeseries at a specific scale using the ssqueezepy library for inverse continuous wavelet transform (ICWT)? I have a minimum reproducible example that uses the ...
337 views

### Interpretation of wavelet trasformation (synchrosqueezing)

I'm working on a dataset of spectroscopies and i'm classifying them by transforming the 1D signal into a 2D one by the ssqueezepy library. For instance, consider to ...
310 views

### Not showing the right frequency in ssqueezepy CWT plot

I am following the ssqueezepy simple example. The plot should show f=12 but it shows around 33. Is this a bug or have I scaled the y-axis wrong? Also the plot is not a straight plot as it waves at ...
169 views

### Why have steps when using ssqueezepy to calculate instantaneous frequency?

I'm using ssqueezepy to calculate signal's instantaneous frequency, The method like below: ...
1 vote