wfdb2mat: convert PhysioBank records to .mat format

The WFDB Software Package, versions 10.4.17 and later, includes wfdb2mat, a program that converts all or any desired portion of the signals in any PhysioNet or compatible record to a .mat file that can be read by Matlab or Octave. If the original signal files have not been downloaded from PhysioNet, <tt>wfdb2mat</tt> can read them directly from the PhysioNet server. The <tt>.mat</tt> files generated by <tt>wfdb2mat</tt> are also directly readable by dozens of other applications in the WFDB Software Package, including WAVE.