Convert PAN-TOMPKINS Algorithm to C Using MATLAB Coder

This document covers what changes were made to an entry on MATLAB Central called pan_tompkin.m for MATLAB Coder compatibility. It is a very popular entry for QRS detection in ECG signals.
http://www.mathworks.com/matlabcentral/fileexchange/45840-complete-pan-tompkins-implementation-ecg-qrs-detector
Step-by-step we show what changes are made to the original MATLAB code to make it MATLAB Coder compatible. For every problem encountered, we explain why the error occurred and then how to change the code for compatibility. In the end we compare the accuracy and the speed of the generated C code against the original MATLAB code. In additional to functional C code, we achieved a nice acceleration factor of 10x over the original MATLAB code.