Function: gradient[2](band pass(numbers('yyx'))) if band pass(numbers('yyx')) if mod(gradient[2](band pass(numbers('yyx'))), band pass(numbers('yyx'))) > gradient[2](band pass(numbers('yyx'))) else numbers('yyx') > band pass(numbers('yyx')) else mod(gradient[2](band pass(numbers('yyx'))), band pass(numbers('yyx')))
