Created
April 23, 2019 06:11
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# Inputs & imports : 必要があるのはそれだけです! | |
from mlbox.preprocessing import * | |
from mlbox.optimisation import * | |
from mlbox.prediction import * | |
paths = ["../input/train.csv","../input/test.csv"] | |
target_name = "SalePrice" | |
# MLBox に任せてください。。。 | |
## ... ファイルの読み込み | |
rd = Reader(sep = ",") | |
df = rd.train_test_split(paths, target_name) #reading and preprocessing (dates, ...) | |
dft = Drift_thresholder() | |
df = dft.fit_transform(df) #removing non-stable features (like ID,...) | |
## ...ハイパーパラメータを調整する | |
rmse = make_scorer(lambda y_true, y_pred: np.sqrt(np.sum((y_true - y_pred)**2)/len(y_true)), greater_is_better=False, needs_proba=False) | |
opt = Optimiser(scoring = rmse, n_folds = 3) | |
# LightGBM | |
space = { | |
'est__strategy':{"search":"choice", | |
"space":["LightGBM"]}, | |
'est__n_estimators':{"search":"choice", | |
"space":[150]}, | |
'est__colsample_bytree':{"search":"uniform", | |
"space":[0.8,0.95]}, | |
'est__subsample':{"search":"uniform", | |
"space":[0.8,0.95]}, | |
'est__max_depth':{"search":"choice", | |
"space":[5,6,7,8,9]}, | |
'est__learning_rate':{"search":"choice", | |
"space":[0.07]} | |
} | |
params = opt.optimise(space, df,15) | |
# ただし、Pipeline全体を調整することもできます。 | |
## ... 予測する | |
prd = Predictor() | |
prd.fit_predict(params, df) | |
# 提出用のフォーマット | |
submit = pd.read_csv("../input/sample_submission.csv",sep=',') | |
preds = pd.read_csv("save/"+target_name+"_predictions.csv") | |
submit[target_name] = preds[target_name+"_predicted"].values | |
submit.to_csv("mlbox.csv", index=False) | |
# それで完成! |
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