All Questions
Tagged with fourier-transform python
6 questions
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Can you decompose a wave approximately?
I have data which looks like composition of sine waves.
I need to decompose it to fewest possible sine waves that would give me tolerable error.
The picture is of a half-period. Each half-period ...
- 159
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Forecasting time series with multiple seasonaliy by using auto_arima(SARIMAX) and Fourier terms [closed]
I am trying to forecast a time series in Python by using auto_arima and adding Fourier terms as exogenous features. The data come from kaggle's Store item demand forecasting challenge. It consists of ...
- 111
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How can i get the phase difference between two frequencies?
I have two signals of the same frequency. Both have frequencies of 13.56Mhz, and I want to find the phase difference between these two frequencies.
The function generator generates a sinusoidal ...
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2
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Looking for repeated patterns in time series data
I have spent the best part of the last few days searching forums and reading papers trying to solve the following question. I have thousands of time series arrays each of varying lengths containing a ...
7
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1
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Surrogate Time Series using Fourier Transform
In the Surrogate Time Series (Schreiber, Schmitz) paper, the authors claim that surrogates for a second order stationary time series can be generated by taking the Fourier Transform of the series, ...
- 2,183
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Fast Fourier Transform with only Hermitian-symmetric output using R
I am trying to translate this gravitational wave signal processing tutorial from Python to R, which I am much more familiar with. I believe I am having problems getting it to work due the whitening ...
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