Category "fft"

Right method for finding 2-D Spatial Spectrum from CSD

I try to implement the spatial spectrum from the above equation (attached) Where kX, kY are the grid points in k space, C(w,r) - cross spectral densities betwe

Create surrogate data in python using fourier transform?

I want to create 10,000 sample (random phase but same power spectra) of my original time series using fourier transform. The method I want to opt is given in fi

How to smooth the curve?

I am using the following code to draw a curve from my two column Raw data ( x=time , y=|float data|).The graph it is plotting is a rough edge graph. Is it possi

FInding fft gives keyerror :'Aligned ' pandas

I have a time series data I am trying to find the fft .But it gives keyerror :Aligned when trying to get the value my data looks like below this is the code: i

FInding fft gives keyerror :'Aligned ' pandas

I have a time series data I am trying to find the fft .But it gives keyerror :Aligned when trying to get the value my data looks like below this is the code: i

How to calculate spectral derivative using scipy.fftpack (DST, DCT)

scipy.fftpack package provides a large number of routines related to Discrete Fourier transforms. I need to calculate 1st and 2nd derivative of a function using