我正尝试为二项分类构建一个随机森林分类器。有人可以解释为什么我每次运行此程序时准确度得分都会有所变化分数在68% - 74%之间变化。此外,我尝试调整参数,但我无法获得超过74的准确度。对此的任何建议也将不胜感激。我尝试使用GridSearchCV,但我只管理了一个体面的3点增加。随机森林分类器
#import libraries
import numpy as np
import pandas as pd
from sklearn.ensemble import RandomForestClassifier
from sklearn.metrics import accuracy_score
from sklearn import preprocessing
#read data into pandas dataframe
df = pd.read_csv("data.csv")
#handle missing values
df = df.dropna(axis = 0, how = 'any')
#handle string-type data
le = preprocessing.LabelEncoder()
le.fit(['Male','Female'])
df.loc[:,'Sex'] = le.transform(df['Sex'])
#split into train and test data
df['is_train'] = np.random.uniform(0, 1, len(df)) <= 0.8
train, test = df[df['is_train'] == True], df[df['is_train'] == False]
#make an array of columns
features = df.columns[:10]
#build the classifier
clf = RandomForestClassifier()
#train the classifier
y = train['Selector']
clf.fit(train[features], train['Selector'])
#test the classifier
clf.predict(test[features])
#calculate accuracy
accuracy_score(test['Selector'], clf.predict(test[features]))
accuracy_score(train['Selector'], clf.predict(train[features]))
链接数据集:https://archive.ics.uci.edu/ml/datasets/ILPD+(Indian+Liver+Patient+Dataset) – TheBeginner
为了提高你的模型,我建议你使用合奏,也尝试XGBoost。 –