From 3a1c440f813f67e13113ed4cffaf0ccb63295e79 Mon Sep 17 00:00:00 2001
From: ali976 <2214960318@qq.com>
Date: Fri, 5 Jul 2024 18:48:17 +0800
Subject: [PATCH] =?UTF-8?q?=E5=88=98=E9=9B=85=E9=9B=B2=E7=9A=84=E4=BD=9C?=
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---
 7-5/__pycache__/datas.cpython-312.pyc | Bin 0 -> 1007 bytes
 7-5/datas.py                          | 156 ++++++++++++++++++++++++++
 7-5/predict.py                        |  39 +++++++
 3 files changed, 195 insertions(+)
 create mode 100644 7-5/__pycache__/datas.cpython-312.pyc
 create mode 100644 7-5/datas.py
 create mode 100644 7-5/predict.py

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diff --git a/7-5/datas.py b/7-5/datas.py
new file mode 100644
index 0000000..b8c155e
--- /dev/null
+++ b/7-5/datas.py
@@ -0,0 +1,156 @@
+
+datas=[
+    #  模拟吕梁第一类房子
+    {
+        "city":"吕梁",
+        "area":100,
+        "room":2,
+        "school":1,
+        "style":1,
+        "price":8000,
+    },
+    {
+        "city":"吕梁",
+        "area":130,
+        "room":2,
+        "school":1,
+        "style":1,
+        "price":7000,
+    },
+    {
+        "city":"吕梁",
+        "area":135,
+        "room":2,
+        "school":1,
+        "style":1,
+        "price":6000,
+    },
+    #  模拟吕梁第二类房子
+    {
+        "city":"吕梁",
+        "area":100,
+        "room":2,
+        "school":1,
+        "style":2,
+        "price":8000,
+    },
+    {
+        "city":"吕梁",
+        "area":130,
+        "room":2,
+        "school":1,
+        "style":2,
+        "price":7000,
+    },
+    {
+        "city":"吕梁",
+        "area":135,
+        "room":2,
+        "school":1,
+        "style":2,
+        "price":6000,
+    },
+    #  模拟吕梁第三类房子
+    {
+        "city":"吕梁",
+        "area":100,
+        "room":3,
+        "school":2,
+        "style":2,
+        "price":8000,
+    },
+    {
+        "city":"吕梁",
+        "area":130,
+        "room":3,
+        "school":2,
+        "style":2,
+        "price":7000,
+    },
+    {
+        "city":"吕梁",
+        "area":135,
+        "room":3,
+        "school":1,
+        "style":2,
+        "price":6000,
+    },
+    #  模拟太原第一类房子
+    {
+        "city": "太原",
+        "area": 100,
+        "room": 2,
+        "school": 1,
+        "style": 1,
+        "price": 8000,
+    },
+    {
+        "city": "太原",
+        "area": 130,
+        "room": 2,
+        "school": 1,
+        "style": 1,
+        "price": 7000,
+    },
+    {
+        "city": "太原",
+        "area": 135,
+        "room": 2,
+        "school": 1,
+        "style": 1,
+        "price": 6000,
+    },
+    #  模拟太原第二类房子
+    {
+        "city": "太原",
+        "area": 100,
+        "room": 2,
+        "school": 1,
+        "style": 2,
+        "price": 8000,
+    },
+    {
+        "city": "太原",
+        "area": 130,
+        "room": 2,
+        "school": 1,
+        "style": 2,
+        "price": 7000,
+    },
+    {
+        "city": "太原",
+        "area": 135,
+        "room": 2,
+        "school": 1,
+        "style": 2,
+        "price": 6000,
+    },
+    #  模拟太原第三类房子
+    {
+        "city": "太原",
+        "area": 100,
+        "room": 3,
+        "school": 2,
+        "style": 2,
+        "price": 8200,
+    },
+    {
+        "city": "太原",
+        "area": 130,
+        "room": 3,
+        "school": 2,
+        "style": 2,
+        "price": 8300,
+    },
+    {
+        "city": "太原",
+        "area": 135,
+        "room": 3,
+        "school": 1,
+        "style": 2,
+        "price": 8600,
+    },
+
+    # 城市 x1   房屋面积 x2    房间数量 x3    学区房 x4    装修  x5
+
+]
diff --git a/7-5/predict.py b/7-5/predict.py
new file mode 100644
index 0000000..e0cd6ee
--- /dev/null
+++ b/7-5/predict.py
@@ -0,0 +1,39 @@
+import numpy as np
+from datas import datas
+X=[]
+Y=[]
+cityMark={"吕梁":1,"太原":2}
+for item in datas:
+    single=[]
+    # 城市
+    single.append(cityMark[item["city"]])
+    # 面积
+    single.append(item["area"])
+    # 学区房
+    single.append(item["school"])
+    # 装修
+    single.append(item["style"])
+
+X.append(single)
+Y.append(item["price"])
+
+X=np.array(X)
+Y=np.array(Y)
+
+theta=np.linalg.pinv(X.T.dot(X)).dot(X.T).dot(Y)
+
+print(theta.dot(np.array([1,100,2,1])))
+
+# 点乘
+# a=np.array([[1,2,3],[1,2,3],[1,2,3]])
+# b=np.array([1,2,3])
+# print(a.dot(b))
+# 转置
+# print(a)
+# print(a.T)
+#
+# 奇异矩阵 逆
+# a=np.array([[3,2,3],[3,2,3],[3,2,3]])
+# b=np.array([1,2,3])
+# print(np.linalg.pinv(a))
+
-- 
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