222

69-5.py

@@ -1,6 +1,7 @@
 x = [0,1,2,3]
 y = [0,0,0,0]
 
+# 追赶法
 def ZGsolve(A,b):
     n = len(b)
     beta = [0]*n
@@ -21,19 +22,21 @@ def ZGsolve(A,b):
 
     return b
 
-
+# 获取相邻点的差分
 def GetDList(list_r):
     result = []
     for i in range(1,len(list_r)):
         result.append(list_r[i] - list_r[i-1])
     return result
 
+# 获取相邻点的差商
 def GetDQList(list_x, list_y):
     result = []
     for i in range(1,len(list_y)):
         result.append((list_y[i] - list_y[i-1]) / (list_x[i] - list_x[i-1]))
     return result
 
+# 三次样条插值
 def CubicSplineInterpolation(list_x,list_y,boundary_type,a1,a2):
     list_h = GetDList(list_x)
     list_dqxy = GetDQList(list_x, list_y)
@@ -68,6 +71,7 @@ def CubicSplineInterpolation(list_x,list_y,boundary_type,a1,a2):
 
     return M,list_h
 
+# 打印矩阵
 def PrintResult(M,list_h,list_x,list_y):
     for i in range(len(list_h)):
         k1 = (M[i+1]-M[i])/6/list_h[i]