The WFDB Toolbox for MATLAB/Octave is a collection of functions for reading, writing, and processing physiologic signals in the formats used by PhysioNet (see README for details).
octave:1> wfdbdemo
Reading samples ECG signal from MIT-BIH Arrhythmia Database
error: invalid conversion from octave_java to matrix
error: called from:
error: /home/degang/Documents/MATLAB/wfdb-app-toolbox-0-9-10/mcode/rdsamp.m at line 197, column 17
error: /home/degang/Documents/MATLAB/wfdb-app-toolbox-0-9-10/mcode/wfdbdemo.m at line 12, column 11
XUbuntu 15.04, wfdb 0-9-10