Hi i’m trying to interpolate a cyclical set of data through a fourier transform model. I can’t just use intrpft because i need the coefficients (amplitude, frequency and phase) to project the wave equation into future. I attach the program.
Basically i use the FFT to find n cycles amplitude and frequency. Then i sync each equation with the data. At the end i superimpose all the n cycles to find the wave equation.
I reached an R2 of 0.71.
The model interpolates very well frequencies and phases but there is some problems with amplitudes i guess.
I wonder if somebody can improve precision further.
ThanksHi i’m trying to interpolate a cyclical set of data through a fourier transform model. I can’t just use intrpft because i need the coefficients (amplitude, frequency and phase) to project the wave equation into future. I attach the program.
Basically i use the FFT to find n cycles amplitude and frequency. Then i sync each equation with the data. At the end i superimpose all the n cycles to find the wave equation.
I reached an R2 of 0.71.
The model interpolates very well frequencies and phases but there is some problems with amplitudes i guess.
I wonder if somebody can improve precision further.
Thanks Hi i’m trying to interpolate a cyclical set of data through a fourier transform model. I can’t just use intrpft because i need the coefficients (amplitude, frequency and phase) to project the wave equation into future. I attach the program.
Basically i use the FFT to find n cycles amplitude and frequency. Then i sync each equation with the data. At the end i superimpose all the n cycles to find the wave equation.
I reached an R2 of 0.71.
The model interpolates very well frequencies and phases but there is some problems with amplitudes i guess.
I wonder if somebody can improve precision further.
Thanks fourier, interpolation MATLAB Answers — New Questions

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