答: min_samples_leaf限定,⼀个结点在分⽀后的每个⼦结点都必须包含⾄少min_samples_leaf个训练样 本,否则分⽀就不会发⽣,或者,分⽀会朝着满⾜每个⼦结点都包含min_samples_leaf个样本的⽅向去 发⽣。⼀般搭配max_depth使⽤,在回归树中有神奇的效果,可以让模型变得更加平滑。这个参数的...
决策树算法是计算机科学家罗斯.昆兰（下图大佬，没错，是图灵，因为我没找到昆兰大佬的照片）在学术休假...
min_samples_split 指定了分裂一个 内部节点 所需的最小样本数,而 min_samples_leaf 指定了一个 叶 节点所需的最小样本数。 例如,如果 min_samples_split = 5 ,并且内部节点有 7 个样本,则允许拆分。但假设拆分结果为两片叶子,一片有 1 个样本,另一片有 6 个样本。如果 min_samples_leaf = 2 ,则将...
est.min_samples_leaf=minSamples est.max_features=mfeatures cv_score=udf.cross_val_score_proba(x_train,y_train,5,est) cv_scores.append(np.mean(cv_score))### Create the labels for display purposes ###params_list.append((mfeatures,minSamples))print'Took %.2f seconds for parameter t...
aFirstly, the teflubenzuron, flufenoxuron and chlorfluazuron in tea dried Oolong tea leaf samples were extracted with 10 mL of acetonitrile for 45 min in a digital air bath oscillator (ZD-85,Changzhou National Test Equipment Institute, China), which was set at 45 _C and 150 rpm cyclotron ...
model.min_samples_leaf= int(x[3]) model.min_weight_fraction_leaf = x[4] model.n_estimators = int(x[5])# loop over foldsforjinrange(0,n_folds): idx0 = np.where(fold_index != j) idx1 = np.where(fold_index == j) x0 = np.array(xtrain)[idx0,:][0]; ...
在下文中一共展示了RandomForestRegressor.min_samples_leaf方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Python代码示例。 示例1: RFR ▲点赞 7▼ # 需要导入模块: from sklearn.ensemble import RandomForestRegressor [as 别名]#...