VB写的最小二乘法曲线拟合VIP专享VIP免费

Option Explicit Dim x() As Double, y() As Double Dim A(20, 20) As Double, M As Double, B() As Double '最多取20 次的拟合 Dim N As Double, I As Double, j As Double Dim xiaoA() As Double Dim Xmin As Double, Xmax As Double Dim Ymin As Double, Ymax As Double Dim X0pos As Double, Y0pos As Double Dim xmaxpos As Double, ymaxpos As Double Dim xstep As Double, ystep As Double Dim xl As Double, yl As Double Dim xbc As Double, ybc As Double Dim bc As Double Dim Xh As Double Private Sub HuaZuoBiao(x() As Double, y() As Double) ReDim xpos(I) As Double ReDim ypos(I) As Double ReDim x(I), y(I) X0pos = Width * 0.25 '坐标原点最左点 Y0pos = Height * 0.75 '坐标原点最低点 xmaxpos = Width * 0.85 '坐标最右点 ymaxpos = Height * 0.15 '坐标最高点 xstep = (xmaxpos - X0pos) / (Xmax - Xmin) '对应X 轴上单位长度代表的屏幕宽度值 ystep = (ymaxpos - Y0pos) / (Ymax - Ymin) '对应Y 轴上单位长度代表的屏幕高度值 '在屏幕上画直角坐标系 ForeColor = vbBlue Line (Width * 0.1, Y0pos)-(Width * 0.9, Y0pos) '画 X 坐标轴,从左10%，到右的90%处 Line (X0pos, Height * 0.1)-(X0pos, Height * 0.9) '画 y 坐标轴,从上 10%，到下的90%处 Font.Size = 20 '指定 X 轴，Y 轴标志的字体大小 CurrentX = Width * 0.9 CurrentY = Y0pos + 100 Print "X" '在横线上画 X 轴标志 '在横线上画 X 轴箭头标志 CurrentX = Width * 0.9 CurrentY = Y0pos Line (CurrentX - 200, CurrentY - 50)-(CurrentX, CurrentY) Line (Cu rrentX, Cu rrentY)-(Cu rrentX - 200, Cu rrentY + 50) Cu rrentX = X0pos - 500 Cu rrentY = Height * 0.1 Print "y " '在纵线上画 Y 轴标志 '在纵线上画 Y 轴箭头标志 Cu rrentX = X0pos Cu rrentY = Height * 0.1 Line (Cu rrentX - 50, Cu rrentY + 200)-(Cu rrentX, Cu rrentY) Line (Cu rrentX, Cu rrentY)-(Cu rrentX + 50, Cu rrentY + 200) Cu rrentX = X0pos + 200 ...