This article serves the purpose of illustrating that signal processing with R is possible – thanks to the signal package – and to keep a reference of some of the stuff that I learned at my last edX course. Anyway, I am by no means an expert on signal processing so I’d prefer to let the pictures and the code speak for themselves. But to give you the idea – I show case the creation and application of an FIR band pass filter (Chebyshev Type 1 in this case) and of an FIR filter created using the Parks-McClellan method with the Remez exchange algorithm. The code snippets are taken from a larger R script which you can find on GitHub. I aim to focus on the essential parts. You’re welcome to share your knowledge and corrections by leaving a comment.