遇见数据集

Model: ML confusion matrix for Isolation

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Mendeley Data2026-04-18 收录
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Purpose: Simulated dataset for exploring the performance of a machine learning model in classifying individuals as "at risk" or "not at risk" based on a set of features. Used for testing model accuracy, evaluating feature importance, and understanding model behavior under varying conditions. Key Components: Features: Synthetic, not based on real-world data. 5 features: Question1, Question2, Question3 (random integers between 1 and 6) Trait1, Trait2 (randomly generated numbers) Represent potential questionnaire responses or other relevant attributes. Target Variable: Binary (0 for "not at risk", 1 for "at risk") Simulated with a 70/30 class distribution (30% "not at risk", 70% "at risk") Sample Size: 2000 samples Machine Learning Model: Random Forest Classifier with 100 estimators and a maximum depth of 10 Trained and evaluated using standard metrics (accuracy, classification report, confusion matrix) Considerations: Simulated Data: Does not reflect the complexity and nuances of real-world data. Feature Meaning: Actual meanings of features are not specified, limiting interpretation of results. Class Balance: Adjusted to be more balanced, but still not representative of all real-world scenarios. Next Steps: Validate with Real-World Data: Assess model performance on actual data to ensure generalisability. Incorporate Additional Features: Explore incorporating more complex and realistic features. Explore Different Models: Experiment with other algorithms to compare performance. Address Class Imbalance: Consider techniques like oversampling or under-sampling to handle imbalanced datasets effectively.

数据集用途: 本数据集为模拟数据集,旨在探索机器学习模型基于一组特征将个体分类为「高风险」与「非高风险」的性能表现,可用于测试模型准确率、评估特征重要性,以及探究模型在不同条件下的行为逻辑。 核心组成要素: 1. 特征集: 所有特征均为合成数据,不基于真实世界数据集,共包含5项特征: - Question1、Question2、Question3:取值为1至6的随机整数,可代表问卷应答或其他相关属性; - Trait1、Trait2:随机生成的数值型特征。 2. 目标变量: 为二分类变量(0代表「非高风险」,1代表「高风险」),模拟得到70/30的类别分布(即30%为「非高风险」样本,70%为「高风险」样本)。 3. 样本规模: 共包含2000个样本。 4. 所用机器学习模型: 采用随机森林分类器(Random Forest Classifier),设置100棵决策树作为基学习器,最大树深度为10。模型训练与评估采用标准评价指标:准确率、分类报告(classification report)与混淆矩阵(confusion matrix)。 使用注意事项: 1. 模拟数据局限性:未反映真实世界数据的复杂性与细微差异; 2. 特征含义缺失:未明确各项特征的实际意义,限制了对模型结果的解释性; 3. 类别分布:经调整后类别分布相对均衡,但仍无法代表所有真实应用场景。 后续优化方向: 1. 采用真实数据验证:在实际数据集上评估模型性能,以验证模型的泛化能力; 2. 新增特征维度:探索引入更复杂且贴合真实场景的特征; 3. 对比多种模型:尝试其他机器学习算法,以对比不同模型的性能表现; 4. 处理类别不平衡问题:可采用过采样、欠采样等技术,有效应对类别不平衡数据集的建模需求。

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2024-01-22
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