Keywords: Fourier series and transform.gif en Function s x in red is an approximation of a square wave formed from just 6 sine functions of different amplitudes and harmonically-related frequencies Their summation is called a Fourier series The Fourier transform S f in blue which depicts amplitude vs frequency reveals the 6 frequencies and their amplitudes 2013-09-19 12 28 34 File Fourier transform time and frequency domains small gif Lucas V Barbosa cc-zero Uploaded with UploadWizard Mathematical animations Fourier analysis Fourier series Order 6 Square waves |