乐高玩具二手价格预测

Jack-Cherish · Dec 10, 2017 · d465aa2 · d465aa2
1 parent 44eda2a
commit d465aa2
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/Regression/lego.py b/Regression/lego.py
@@ -78,7 +78,7 @@ def ridgeRegres(xMat, yMat, lam = 0.2):
 	xTx = xMat.T * xMat
 	denom = xTx + np.eye(np.shape(xMat)[1]) * lam
 	if np.linalg.det(denom) == 0.0:
-		print("矩阵为奇异矩阵,不能转置")
+		print("矩阵为奇异矩阵,不能求逆")
 		return
 	ws = denom.I * (xMat.T * yMat)
 	return ws
@@ -159,7 +159,7 @@ def standRegres(xArr,yArr):
 	xMat = np.mat(xArr); yMat = np.mat(yArr).T
 	xTx = xMat.T * xMat							#根据文中推导的公示计算回归系数
 	if np.linalg.det(xTx) == 0.0:
-		print("矩阵为奇异矩阵,不能转置")
+		print("矩阵为奇异矩阵,不能求逆")
 		return
 	ws = xTx.I * (xMat.T*yMat)
 	return ws