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Date: Fri, 5 Jul 2024 22:28:12 +0800
Subject: [PATCH] =?UTF-8?q?=E6=9D=8E=E4=BD=A9=E6=B4=81=E7=9A=84=E4=BD=9C?=
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---
 7.5/data.py    | 174 +++++++++++++++++++++++++++++++++++++++++++++++++
 7.5/predict.py |   8 +++
 2 files changed, 182 insertions(+)
 create mode 100644 7.5/data.py
 create mode 100644 7.5/predict.py

diff --git a/7.5/data.py b/7.5/data.py
new file mode 100644
index 0000000..f1964a5
--- /dev/null
+++ b/7.5/data.py
@@ -0,0 +1,174 @@
+datas = [
+    {
+        "city": "吕梁",
+        "area": 100,
+        "rooms": 2,
+        "school": 1,
+        "style": 1,
+        "price": 8000,
+    },
+    {
+        "city": "吕梁",
+        "area": 120,
+        "rooms": 2,
+        "school": 1,
+        "style": 1,
+        "price": 8300,
+    },
+    {
+        "city": "吕梁",
+        "area": 130,
+        "rooms": 2,
+        "school": 1,
+        "style": 1,
+        "price": 8600,
+    },
+    {
+        "city": "吕梁",
+        "area": 140,
+        "rooms": 2,
+        "school": 1,
+        "style": 1,
+        "price": 9000,
+    },
+    {
+        "city": "吕梁",
+        "area": 150,
+        "rooms": 2,
+        "school": 1,
+        "style": 1,
+        "price": 9300,
+    },
+    {
+        "city": "吕梁",
+        "area": 160,
+        "rooms": 2,
+        "school": 1,
+        "style": 1,
+        "price": 9500,
+    },
+    {
+        "city": "吕梁",
+        "area": 170,
+        "rooms": 4,
+        "school": 3,
+        "style": 2,
+        "price": 9500,
+    },
+    {
+        "city": "吕梁",
+        "area": 180,
+        "rooms": 4,
+        "school": 4,
+        "style": 3,
+        "price": 9600,
+    },
+    {
+        "city": "吕梁",
+        "area": 190,
+        "rooms": 2,
+        "school": 1,
+        "style": 1,
+        "price": 9400,
+    },
+    {
+        "city": "太原",
+        "area": 210,
+        "rooms": 2,
+        "school": 1,
+        "style": 1,
+        "price": 9200,
+    },
+    {
+        "city": "太原",
+        "area": 200,
+        "rooms": 2,
+        "school": 1,
+        "style": 1,
+        "price": 9100,
+    },
+    {
+        "city": "太原",
+        "area": 190,
+        "rooms": 2,
+        "school": 1,
+        "style": 1,
+        "price": 9000,
+    },
+    {
+        "city": "吕梁",
+        "area": 180,
+        "rooms": 2,
+        "school": 1,
+        "style": 1,
+        "price": 8900,
+    },
+    {
+        "city": "太原",
+        "area": 170,
+        "rooms": 2,
+        "school": 1,
+        "style": 1,
+        "price": 8800,
+    },
+    {
+        "city": "太原",
+        "area": 160,
+        "rooms": 2,
+        "school": 1,
+        "style": 1,
+        "price": 8700,
+    },
+    ]
+
+
+import numpy as np
+from datas import datas
+X=[]
+Y=[]
+cityMark={"吕梁":1,"太原":2}
+for item in datas:
+    single=[]
+
+single.append(cityMark[item["city"]])
+single.append(item["rooms"])
+single.append(item["school"])
+single.append(item["style"])
+single.append(item["area"])
+X.append(single)
+Y.append(item["price"])
+
+X=np.array(X)
+Y=np.array(Y)
+
+theta=np.linalg.pinv(X.T.dot(X)).dot(Y)
+
+
+print(theta)
+
+print(theta.dot(np.array([2,100,2,1,1])))
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
diff --git a/7.5/predict.py b/7.5/predict.py
new file mode 100644
index 0000000..3cae856
--- /dev/null
+++ b/7.5/predict.py
@@ -0,0 +1,8 @@
+import numpy as np
+a=np.array([[3,2,3],[3,2,3],[3,2,3]])
+b=np.array([1,2,3])
+
+
+print(a.T)
+print(a.dot(b))
+print(np.linalg.pinv(a))
-- 
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