April 2014
Beginner to intermediate
830 pages
15h 21m
Chinese
Content preview from Mathematica 錦囊妙計
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110
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第三章
3.7 操作矩陣的行與列
問題點
你想新增、移除或修改矩陣的行或列。[Page-110]
解決方案
許多串列的操作（包含矩陣等高維度串列）並不會修改輸入串列，而是輸出處理後的新
串列。例如，
Append[myList,10]
將輸出新串列，而不會更改到
myList
串列，但有時候
你就是想要修改原始串列。
建立5乘5的零矩陣
設定第2行為{1,2,3,4,5}
設定第3列為3
設定3乘3的子矩陣為9
ch03.indd 110 2014/4/2 上午 05:19:08
3.7 操作矩陣的行與列
|
111
你也許會需要新增元素、列向量或行向量。[Page-111]
新增行向量
新增列向量
討論說明
這種會改變輸入的破壞性操作應盡量避免，因為這很容易導致難找的錯誤。其一，這使
得程式碼對執行順序十分敏感；其次，你必須謹記這些操作是作用在符號上而不是串列
上。意指為何？讓我們檢查
AppendTo
指令的屬性。
ch03.indd 111 2014/4/2 上午 05:19:08
112
|
第三章
把重點放在
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