1: function error = launch(program,np) 2: % 3: % error = launch(program,np) 4: % Starts up PETSc program 5: % see openprot, closeport and receive 6: disp('You must build the launch mex file by doing: cd ${PETSC_DIR}/src/sys/src/viewer/impls/socket/matlab; make BOPT=g matlabcodes')