机器学习数据集

UCI机器学习数据资源库

http://archive.ics.uci.edu/ml/

R语言读取：

iris.data = read.csv(url("http://archive.ics.uci.edu/ml/machine-learning-databases/iris/iris.data"),header=FALSE,col.names=c("Sepal.Length","Sepal.Width","Petal.Length","Petal.Width","Species"))

Kaggle数据集

https://www.kaggle.com/