From 6ff967aaa317073b43c8764386823191cdf8656c Mon Sep 17 00:00:00 2001
From: zhang <zch921005@126.com>
Date: Sat, 6 Aug 2022 19:36:09 +0800
Subject: update

---
 double_11.py | 43 ++++++++++++++++++++++++++++---------------
 1 file changed, 28 insertions(+), 15 deletions(-)

(limited to 'double_11.py')

diff --git a/double_11.py b/double_11.py
index 118cfb7..92d14ee 100644
--- a/double_11.py
+++ b/double_11.py
@@ -1,19 +1,32 @@
+#
+# import numpy as np
+# import matplotlib.pyplot as plt
+#
+# years = [y+2009 for y in range(11)]
+# gmvs = [0.5, 9.36, 52, 191, 350, 571, 912, 1207, 1682, 2135, 2684]
+#
+#
+# def polynomial(xs, ys, n):
+#     f = np.polyfit(xs, ys, n)
+#     def func(x):
+#         return sum(f[i]*x**(n-i)for i in range(n+1))
+#     return func
+#
+# f = polynomial(years, gmvs, 3)
+# print(f(2020))
+#
+# plt.plot(years, gmvs, marker='o')
+# plt.show()
 
-import numpy as np
-import matplotlib.pyplot as plt
+if __name__ == '__main__':
+    daily_rate = 0.00009080
+    annual_rate = (1+daily_rate)**365
 
-years = [y+2009 for y in range(11)]
-gmvs = [0.5, 9.36, 52, 191, 350, 571, 912, 1207, 1682, 2135, 2684]
+    fv_list = [5, 5, 5, 105]
 
+    pv = 0
+    for i in range(len(fv_list)):
+        fv = fv_list[i]
+        pv += fv/annual_rate**(i+1)
 
-def polynomial(xs, ys, n):
-    f = np.polyfit(xs, ys, n)
-    def func(x):
-        return sum(f[i]*x**(n-i)for i in range(n+1))
-    return func
-
-f = polynomial(years, gmvs, 3)
-print(f(2020))
-
-plt.plot(years, gmvs, marker='o')
-plt.show()
\ No newline at end of file
+    print(pv)
\ No newline at end of file
-- 
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