標題: 請教一個白痴問題求多項式系數 運算 [打印本頁]

---

作者: jysun1    時間: 2018-8-27 13:47     標題: 請教一個白痴問題求多項式系數 運算

y=ax2+b+c
求下列 -b/2a VBA 要如何寫

y = 0.325x2 - 2.285x + 96.81
y = -0.4493x2 + 4.6159x + 79.479
y = -0.5191x2 + 4.9765x + 77.152
y = -0.3759x2 + 3.0353x + 80.458
y = -0.828x2 + 6.9143x + 71.517
y = -0.7489x2 + 5.9881x + 72.839
y = -0.6864x2 + 5.9984x + 69.456
y = -0.7438x2 + 6.3198x + 68.193
y = -0.9405x2 + 8.6403x + 60.431
y = -0.7646x2 + 7.1892x + 61.879
y = -0.5975x2 + 6.2365x + 61.215
感謝~

---

作者: a5007185    時間: 2018-8-27 15:07

回復 1# jysun1

請參考

1.    
   
2. Sub 計算(PT As Range)
   
3.     Dim strMsg, a#, b#, c#
   
4.     strMsg = Split(PT, " ")
   
5.     a = Left(strMsg(2), Len(strMsg(2)) - 2)
   
6.     b = Left(strMsg(4), Len(strMsg(4)) - 1)
   
7.     If strMsg(3) = "-" Then b = -b
   
8.     c = strMsg(6)
   
9.     If strMsg(5) = "-" Then c = -c
   
10.     'MsgBox a & Chr(10) & b & Chr(10) & c
    
11.     PT.Offset(0, 1) = -b / (2 * a)
    
12. End Sub

複製代碼

[attach]29288[/attach]

---

作者: jysun1    時間: 2018-8-27 22:28

回復 2# a5007185

感謝大大，
搞定了!
謝謝您的回覆~

---

歡迎光臨 麻辣家族討論版版 (http://forum.twbts.com/)