Undefined function or variable 'ship'.

Error in <a href="matlab:matlab.internal.language.introspective.errorDocCallback('ceilo_daily_plot_program_BigSur_2018', 'D:\DATA\BigSur_2018\Scientific_analysis\programs\ceilo\ceilo_daily_plot_program_BigSur_2018.m', 28)" style="font-weight:bold">ceilo_daily_plot_program_BigSur_2018</a> (<a href="matlab: opentoline('D:\DATA\BigSur_2018\Scientific_analysis\programs\ceilo\ceilo_daily_plot_program_BigSur_2018.m',28,0)">line 28</a>)
        print_buffer = [way_images_ceilo, cruise, '_', ship, '_cloudbase_', yyyy, '_', mon, '_', dy, '_' jds, graphformat];

Error in <a href="matlab:matlab.internal.language.introspective.errorDocCallback('Auto_CL31_daily_process_BigSur_2018', 'D:\DATA\BigSur_2018\Scientific_analysis\programs\ceilo\Auto_CL31_daily_process_BigSur_2018.m', 43)" style="font-weight:bold">Auto_CL31_daily_process_BigSur_2018</a> (<a href="matlab: opentoline('D:\DATA\BigSur_2018\Scientific_analysis\programs\ceilo\Auto_CL31_daily_process_BigSur_2018.m',43,0)">line 43</a>)
    eval([ 'ceilo_daily_plot_program_', cruise])