This is the MATLAB implementation of the algorithm proposed in the paper

Pei, Soo-Chang, and Chien-Cheng Tseng. "Elimination of AC interference in electrocardiogram using IIR notch filter with transient suppression." Biomedical Engineering, IEEE Transactions on 42.11 (1995): 1128-1132.

This technique uses vector projection to minimize the problem of transient values, common to the use of IIR filters.

Full credit goes to the authors of the paper.

Submission includes sample ECG data (as a .mat file), as well as a demo script for easier comprehension, use, and testing.