Kaggle实战：Digit Recognizer[KNN算法]

Digit Recognizer

• 链接地址：https://www.kaggle.com/c/digit-recognizer
• 比赛内容：识别手写体
• 采用算法：knn
• 比赛成绩：正确率96.800%

Python代码

import pandas as pddata = pd.read_csv("train.csv")data.head()dataset = data.iloc[:,1:]   #提取特征dataset.head()label = data.iloc[:,0] #提取标签label.head()dataset.describe()label.describe()from sklearn import neighborsknn = neighbors.KNeighborsClassifier(n_neighbors=5)  knn.fit(dataset, label)  test = pd.read_csv("test.csv")pred = knn.predict(test)print(pred)import numpy as npa = pd.Series(pred)b = pd.Series(np.arange(1,28000))c = pd.DataFrame([a,b])d = pd.DataFrame(c.T)d.to_csv("result.csv")