作者查詢 / LPH66
作者 LPH66 在 PTT [ Mathematica ] 看板的留言(推文), 共451則
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1F推:先後順序的問題: Mathematica 是你輸入什麼就照算什麼11/25 16:53
2F→:除非特別說明 (例如使用 := 指名) 不然算完就固定了不會再改11/25 16:54
1F推:Show[圖一,圖二,PlotRange->{Automatic,{-10,10}}]10/20 17:42
2F→:不過我畫起來還是有斷層...10/20 17:42
1F推:有 /. 可以用, 不過你要注意前面 Solve 出來的型式10/09 16:59
2F→:(這是先求完再代入的做法)10/09 16:59
1F推:也許原 PO 是看不懂這個結果...後三個特徵向量都是零向量08/13 02:35
1F推:重開一個 Kernel? (不過這樣的話計算的函式就要重新執行)08/10 21:07
2F→:可以用 Quit[] 退出這個 Kernel 再執行任何式子就會新開08/10 21:08
5F→:所以排序演算法從來沒有一定要兩兩代入比對啊08/03 18:13
6F→:也就是說這個排序函數必須自己要是個全序關係才行08/03 18:14
1F推:Sort[M,#1[[2]]<#2[[2]]}&] (這在 Sort 的 F1 範例裡就有)07/25 21:03
2F→:上一行的大括號請去掉 orz07/25 21:03
1F推:或許是取代不完全? 試著改用 //. (ReplaceRepeated) 看看07/21 08:27
2F→:用這個會一直代到沒得代為止07/21 08:27
5F推:那看能不能貼上來給大家看看07/21 21:42
1F推:除 Sin[wt] 之後 //Expand ?07/18 23:34
1F→:Mathematica 並沒有辦法使得某兩個變數具有某個複雜的關係06/09 22:19
2F→:所以這種狀況只能先以 y 表示 x 再寫積分式算06/09 22:19