最小二乘法

最小二乘法的控制台实现，给出一系列的点坐标，能够通过这段代码拟合成一段直线，算出斜率和截距，给出方程式 static bool fnCalculateLineKB(ref List mapFoldList, ref double fk, ref double fb) { double fmX = 0.0; double fmY = 0.0; double fmXX = 0.0; double fmXY = 0.0; double fn = 0.0; if (0 == mapFoldList.Count) { return false; } long lCount = mapFoldList.Count; if (lCount < 2) { return false; } fn = lCount; foreach (sAD_PWR iter in mapFoldList) { fmX += iter.fAD; fmY += iter.fPWR; fmXX += iter.fAD * iter.fAD; fmXY += iter.fAD * iter.fPWR; } if (Math.Abs(fmX * fmX - fmXX * fn) < 0.000001) { return false; } fk = (fmY * fmX - fmXY * fn) / (fmX * fmX - fmXX * fn); fb = (fmY - fmX * fk) / fn; return true; }