1: function port = openport(number)
  2: %
  3: %  port = openport(number)
  4: %  Opens a port to receive matrices from Petsc.
  5: % see closeport and receive
  6: disp('You must build the openport mex file by doing: cd ${PETSC_DIR}/src/sys/src/viewer/impls/socket/matlab; make BOPT=g matlabcodes')