[英]How to download and load ML model using sentence transformer with dockerfile?
[英]Parameter Tuning for ML model with column transformer and pipeline
我的代碼可以完美運行,直到擬合最終模型。 但我不知道如何為管道做 GridSearchCV 或 RandomizedSearchCV。 請幫助我。
import pandas as pd
import numpy as np
from sklearn.compose import make_column_transformer
from sklearn.preprocessing import OneHotEncoder
from sklearn.preprocessing import StandardScaler
from sklearn.ensemble import RandomForestRegressor
from sklearn.pipeline import make_pipeline
df = pd.read_csv('data/vehicle_dataset_v4A.csv')
X = df.drop('price', axis=1)
y = df['price']
numerical_ix = X.select_dtypes(include=['int64', 'float64']).columns
categorical_ix = X.select_dtypes(include=['object', 'bool']).columns
col_transform = make_column_transformer(
(OneHotEncoder(), categorical_ix),
(StandardScaler(), numerical_ix),
remainder='passthrough'
)
model = RandomForestRegressor()
pipe = make_pipeline(col_transform,model)
pipe.fit(X, y)
我嘗試了以下代碼。 代碼運行時沒有任何錯誤,但是當我嘗試使用 Gridsearchcv 進行預測時,它會在不同時間拋出不同的錯誤。 希望應該有一個解決方案。 否則,如果我能知道 gridsearch 之后最好的參數是什么,我可以直接將這些參數應用到模型中。
lr = {
'base_score':[0.4,0.45,0.5,0.55,0.6],
'max_depth':[1,2,3,4,6,8,10],
'subsample':[0.5,0.6,0.7,0.8,0.9,1],
'n_estimators': [50,100,200,250,300],
'learning_rate': [0.05,0.1,0.4,0.5,0.8,0.9,1],
'min_child_weight': [0.1,0.5,1,1.5,2,3],
'gamma': [0,0.1,0.5,1,1.5,2,2.5,3]
}
clf = make_pipeline(OneHotEncoder(),
StandardScaler(with_mean=False),
GridSearchCV(RandomForestRegressor(),
param_grid=lr,
scoring='r2',cv=3,verbose=2))
關於你的申請的三個想法:
OneHotEncoder
用於RandomForestRegressor
,您不需要它。make_pipeline
,這對您的問題來說make_pipeline
過分了。StandardScaler
,然后運行GridSearchCV
。請對此進行測試並向我們提供反饋。
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