#1.将CSV文件加载到DMatrix(train.csv是文件名,第0列是lable)# label_column specifies the index of the column containing the true label
dtrain = xgb.DMatrix('train.csv?format=csv&label_column=0')
[19:35:57] 11x2 matrix with 22 entries loaded from train.csv?format=csv&label_column=0
#2.将NumPy数组加载到DMatrix
data = np.random.rand(5, 10) # 5 entities, each contains 10 features
label = np.random.randint(2, size=5) # binary target
dtrain = xgb.DMatrix(data, label=label)