The Matlab ® code used to create this image is available at: https://github.com/peterhcharlton/RRest/blob/master/RRest_v2.0/Publication_Specific_Scripts/make_feature_filter_respiratory_signals_plot.m
Source: P. H. Charlton and T. Bonnici et al., Extraction of respiratory signals from the electrocardiogram and photoplethysmogram: technical and physiological determinants, Physiological Measurement, 38(5), 2017. https://doi.org/10.1088/1361-6579/aa670e
Own work
Peterhcharlton