Thank you for your question. I'd like to recommend to bring more details and context to your topic. It also helps to have screenshot(s) to better understand what you are trying to do in your process.
This will increase your chances to receive meaningful help from other Community members.
Example: Introduction to FFTs Fast Fourier transform (FFT) is a numerical method for expressing the frequency content of a set of data measured over time. The data are often continuous, constituting a waveform. To work with the data numerically, they are sampled at regular time intervals at some sample rate. The figures below illustrate some sampled waveforms and the magnitudes of their Fourier transforms plotted against frequency.
