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循環遍歷列表

您好，我有一個月份名稱列表，我想循環遍歷該列表，從特定月份開始，比如說六月（第 6 個月），然後向後追溯到一月。

MonthList ={"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"};

//total number of months
nMonths = N Items (MonthList);

//initialize list of selected months
ElevenMo = {};

For (i = 6, i <= 11, i -= 1,
 If (i >= 1, Continue () );
 nextMonth = MonthList[i];
 Insert Into (ElevenMo, nextMonth[i]),
 
);

我認為我有基礎知識，但我的循環一直在無限循環中進行。我將感謝您關於如何修復它的建議。 是的，在某個時候循環必須回到 12 月，但這將是另一場戰鬥。

 

進階統計建模消費者與市場研究品質和工藝工程回覆：循環遍歷列表

TX 和 ThuongLe 您好，非常感謝您的回答。 它們也是很好的教訓。 我喜歡 StartMonth 和 TargetMonth 的優雅。

回覆：循環遍歷列表

這應該有效

MonthList ={"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"};

//total number of months
nMonths = N Items (MonthList);

//initialize list of selected months
ElevenMo = {};

For (i = 6, i > 0, i--, 
 nextMonth = MonthList[i];
 Insert Into (ElevenMo, nextMonth),
);

回覆：循環遍歷列表

這裡有兩種方法可以做到這一點......我冒昧地添加了根據您想要開始的月份名稱確定起始值的功能。兩個範例給出相同的結果

Names Default To Here( 1 );
MonthList = {"January", "February", "March", "April", "May", "June",
"July", "August", "September", "October", "November", "December"};

//total number of months
nMonths = N Items( MonthList );

targetMonth = "June";
startMonth = contains( MonthList, targetMonth );

//initialize list of selected months
ElevenMo = {};

For( i = startMonth, i >= 1, i--,
 Insert Into( ElevenMo, MonthList[i] );, 
);

Names Default To Here( 1 );
MonthList = {"January", "February", "March", "April", "May", "June",
"July", "August", "September", "October", "November", "December"};

//total number of months
nMonths = N Items( MonthList );

targetMonth = "June";
startMonth = contains( MonthList, targetMonth );
ElevenMo = MonthList[1::startMonth]