;date = ['2014-03-19', '2014-03-20', '2014-03-21'] ;date = '2014-03-19' ;date = ['2014-09-22', '2014-09-23', '2014-09-24'] ;date = ['2014-10-17', '2014-10-18', '2014-10-19'] set_plot, 'z' date = ['2014-10-23', '2014-10-21', '2014-10-20'] For j = 0, n_elements(date)-1 Do Begin mvn_over_shell, date=date[j], /date_only, instr_to_process = 'over' Endfor date = ['2014-10-22', '2014-10-19'] For j = 0, n_elements(date)-1 Do Begin mvn_over_shell, date=date[j], /date_only Endfor End