To design a FIR filter, we can use the Parks-McClellan algorithm. The first step is to compute the filter order $N$ using the following formula:
Communities like Stack Exchange or specialized engineering groups often discuss these problems in detail. Conclusion To design a FIR filter, we can use
% Visualize results visualize_results(results); To design a FIR filter
(by Moon and Stirling) can be tricky since official manuals are usually restricted to instructors. To design a FIR filter, we can use