J'ai essayé Auto Gluon
introduction
J'ai essayé d'utiliser un outil AutoML appelé AutoGluon. Cette fois, je décrirai le contenu de l'essai des données tabulaires et de l'exemple de code préparé par AutoGluon.
Qu'est-ce que Auto Gluon
Aperçu
Il s'agit d'un outil d'apprentissage automatique open source et si vous préparez les données au format tabulaire, il effectuera automatiquement une ingénierie simple de la quantité d'entités, la sélection de modèles, le réglage des hyperparamètres et l'ensemble.
https://autogluon.mxnet.io/
Depuis le 2 mai 2020, la version 0.0.6 a été publiée.
Pour les données structurées, il semble que la classification, la régression, la classification des images, la détection d'objets et la classification des phrases peuvent être effectuées.
Évaluation de l'exactitude des données tabulaires (papier)
https://arxiv.org/pdf/2003.06505.pdf
La précision est évaluée dans cet article. Pour AutoGluon, TPOT, H2O, AutoWEKA, auto-sklearn et Google AutoML Tables, lors du calcul de la précision de prédiction à l'aide de 50 types d'ensembles de données, AutoGluon était le plus précis.
Cet article cite l'assemblage de piles multicouches comme une caractéristique d'Auto Gluon. Veuillez consulter le document pour plus de détails.
environnement
Réalisé au Google Colaboratory.
Contenu
Préparation
!pip install --upgrade mxnet
!pip install autogluon
L'installation est maintenant terminée. A ce stade, des erreurs et des avertissements sont apparus dans la version pandas etc., mais il était finalement utilisable.
import autogluon as ag
from autogluon import TabularPrediction as task
J'ai eu une erreur ici, mais lorsque j'ai redémarré le runtime, il s'est exécuté sans erreur. Utilisez les mêmes données que dans le didacticiel.
train_data = task.Dataset(file_path='https://autogluon.s3.amazonaws.com/datasets/Inc/train.csv')
train_data = train_data.head(10000)
print(train_data.head())
Les données utilisées étaient limitées à 10 000 lignes pour réduire le temps d'exécution. Il y a 15 colonnes, y compris des nombres et des chaînes, comme indiqué ci-dessous.
Loaded data from: https://autogluon.s3.amazonaws.com/datasets/Inc/train.csv | Columns = 15 / 15 | Rows = 39073 -> 39073
age workclass fnlwgt ... hours-per-week native-country class
0 25 Private 178478 ... 40 United-States <=50K
1 23 State-gov 61743 ... 35 United-States <=50K
2 46 Private 376789 ... 15 United-States <=50K
3 55 ? 200235 ... 50 United-States >50K
4 36 Private 224541 ... 40 El-Salvador <=50K
[5 rows x 15 columns]
La variable objective utilise également class comme dans le didacticiel.
label_column = 'class'
print("Summary of class variable: \n", train_data[label_column].describe())
Summary of class variable:
count 10000
unique 2
top <=50K
freq 7568
Name: class, dtype: object
Une fois construit par défaut
Je vais en fait construire un modèle d'apprentissage automatique, mais comme il ne correspond qu'aux données ci-dessus,
C'est très facile de construire un modèle.
Tout d'abord, essayez d'exécuter l'argument fit avec presque les valeurs par défaut.
%%time
dir = 'agModels-predictClass' # specifies folder where to store trained models
predictor = task.fit(train_data=train_data, label=label_column, output_directory=dir)
Il semble que 14 variables explicatives sont des valeurs numériques et que le type d'objet est discriminé et que l'ingénierie de la quantité de caractéristiques est effectuée. Je n'ai pas vu ce qui s'est passé dans le journal. Par défaut, la précision est utilisée pour l'optimisation et l'arrêt anticipé. J'ai vérifié environ 10 modèles et il a fallu 2 minutes pour terminer l'assemblage, donc j'ai pensé que c'était très rapide. Cependant, comme décrit dans la référence API (https://autogluon.mxnet.io/api/autogluon.task.html#autogluon.task.TabularPrediction.fit), le réglage des hyperparamètres n'est pas effectué par défaut. ..
Beginning AutoGluon training ...
AutoGluon will save models to agModels-predictClass/
Train Data Rows: 10000
Train Data Columns: 15
Preprocessing data ...
Here are the first 10 unique label values in your data: [' <=50K' ' >50K']
AutoGluon infers your prediction problem is: binary (because only two unique label-values observed)
If this is wrong, please specify `problem_type` argument in fit() instead (You may specify problem_type as one of: ['binary', 'multiclass', 'regression'])
Selected class <--> label mapping: class 1 = >50K, class 0 = <=50K
Feature Generator processed 10000 data points with 14 features
Original Features:
int features: 6
object features: 8
Generated Features:
int features: 0
All Features:
int features: 6
object features: 8
Data preprocessing and feature engineering runtime = 0.15s ...
AutoGluon will gauge predictive performance using evaluation metric: accuracy
To change this, specify the eval_metric argument of fit()
AutoGluon will early stop models using evaluation metric: accuracy
Fitting model: RandomForestClassifierGini ...
0.842 = Validation accuracy score
2.44s = Training runtime
0.22s = Validation runtime
Fitting model: RandomForestClassifierEntr ...
0.846 = Validation accuracy score
3.04s = Training runtime
0.22s = Validation runtime
Fitting model: ExtraTreesClassifierGini ...
0.83 = Validation accuracy score
1.93s = Training runtime
0.22s = Validation runtime
Fitting model: ExtraTreesClassifierEntr ...
0.836 = Validation accuracy score
2.25s = Training runtime
0.22s = Validation runtime
Fitting model: KNeighborsClassifierUnif ...
0.772 = Validation accuracy score
0.07s = Training runtime
0.11s = Validation runtime
Fitting model: KNeighborsClassifierDist ...
0.748 = Validation accuracy score
0.04s = Training runtime
0.11s = Validation runtime
Fitting model: LightGBMClassifier ...
0.854 = Validation accuracy score
1.21s = Training runtime
0.02s = Validation runtime
Fitting model: CatboostClassifier ...
0.864 = Validation accuracy score
8.85s = Training runtime
0.02s = Validation runtime
Fitting model: NeuralNetClassifier ...
0.854 = Validation accuracy score
93.04s = Training runtime
0.26s = Validation runtime
Fitting model: LightGBMClassifierCustom ...
0.852 = Validation accuracy score
2.2s = Training runtime
0.03s = Validation runtime
Fitting model: weighted_ensemble_k0_l1 ...
0.864 = Validation accuracy score
0.82s = Training runtime
0.0s = Validation runtime
AutoGluon training complete, total runtime = 121.37s ...
CPU times: user 1min 27s, sys: 6.04 s, total: 1min 33s
Wall time: 2min 1s
Vous pouvez voir un résumé des modèles construits avec fit_summary.
Cette fois, le résultat était que le modèle d'ensemble était le plus élevé avec une précision = 0,864.
results = predictor.fit_summary()
*** Summary of fit() ***
Estimated performance of each model:
model score_val fit_time pred_time_val stack_level
10 weighted_ensemble_k0_l1 0.864 0.822482 0.002695 1
7 CatboostClassifier 0.864 8.849893 0.016495 0
8 NeuralNetClassifier 0.854 93.040479 0.263205 0
6 LightGBMClassifier 0.854 1.208874 0.018122 0
9 LightGBMClassifierCustom 0.852 2.201691 0.032273 0
1 RandomForestClassifierEntr 0.846 3.039360 0.218410 0
0 RandomForestClassifierGini 0.842 2.443804 0.224741 0
3 ExtraTreesClassifierEntr 0.836 2.247025 0.215692 0
2 ExtraTreesClassifierGini 0.830 1.930307 0.217770 0
4 KNeighborsClassifierUnif 0.772 0.072491 0.113025 0
5 KNeighborsClassifierDist 0.748 0.035974 0.112589 0
Number of models trained: 11
Types of models trained:
{'CatboostModel', 'LGBModel', 'RFModel', 'KNNModel', 'WeightedEnsembleModel', 'TabularNeuralNetModel'}
Bagging used: False
Stack-ensembling used: False
Hyperparameter-tuning used: False
User-specified hyperparameters:
{'NN': {'num_epochs': 500}, 'GBM': {'num_boost_round': 10000}, 'CAT': {'iterations': 10000}, 'RF': {'n_estimators': 300}, 'XT': {'n_estimators': 300}, 'KNN': {}, 'custom': ['GBM']}
Plot summary of models saved to file: agModels-predictClass/SummaryOfModels.html
*** End of fit() summary ***
Faisons maintenant une prédiction pour les données de test et calculons la précision. Exécutez les données de test de la même manière que dans le didacticiel.
test_data = task.Dataset(file_path='https://autogluon.s3.amazonaws.com/datasets/Inc/test.csv')
y_test = test_data[label_column] # values to predict
test_data_nolab = test_data.drop(labels=[label_column],axis=1) # delete label column to prove we're not cheating
print(test_data_nolab.head())
Loaded data from: https://autogluon.s3.amazonaws.com/datasets/Inc/test.csv | Columns = 15 / 15 | Rows = 9769 -> 9769
age workclass fnlwgt ... capital-loss hours-per-week native-country
0 31 Private 169085 ... 0 20 United-States
1 17 Self-emp-not-inc 226203 ... 0 45 United-States
2 47 Private 54260 ... 1887 60 United-States
3 21 Private 176262 ... 0 30 United-States
4 17 Private 241185 ... 0 20 United-States
[5 rows x 14 columns]
Si la prédiction et l'entraînement sont des scripts séparés, utilisez load pour charger le modèle.
Il existe également une API pour calculer la précision, alors utilisez-la.
predictor = task.load(dir) # unnecessary, just demonstrates how to load previously-trained predictor from file
y_pred = predictor.predict(test_data_nolab)
print("Predictions: ", y_pred)
perf = predictor.evaluate_predictions(y_true=y_test, y_pred=y_pred, auxiliary_metrics=True)
Evaluation: accuracy on test data: 0.8722489507626164
Evaluations on test data:
{
"accuracy": 0.8722489507626164,
"accuracy_score": 0.8722489507626164,
"balanced_accuracy_score": 0.796036984340255,
"matthews_corrcoef": 0.6303973015503467,
"f1_score": 0.8722489507626164
}
Predictions: [' <=50K' ' <=50K' ' >50K' ... ' <=50K' ' <=50K' ' <=50K']
Detailed (per-class) classification report:
{
" <=50K": {
"precision": 0.8965605421301623,
"recall": 0.9410817339954368,
"f1-score": 0.9182818229439498,
"support": 7451
},
" >50K": {
"precision": 0.7746406570841889,
"recall": 0.6509922346850734,
"f1-score": 0.7074542897327709,
"support": 2318
},
"accuracy": 0.8722489507626164,
"macro avg": {
"precision": 0.8356005996071756,
"recall": 0.796036984340255,
"f1-score": 0.8128680563383603,
"support": 9769
},
"weighted avg": {
"precision": 0.8676312460367478,
"recall": 0.8722489507626164,
"f1-score": 0.8682564137942402,
"support": 9769
}
}
Le résultat était une précision de 0,872. J'ai pensé que c'était pratique car le score f1, etc. est également affiché dans une liste.
Lorsque le réglage d'hyper paramètre est activé
Maintenant, je voudrais essayer combien la précision change lorsque le réglage des hyperparamètres est effectué. Le code est référencé ici.
https://autogluon.mxnet.io/tutorials/tabular_prediction/tabular-indepth.html#
%%time
nn_options = { # specifies non-default hyperparameter values for neural network models
'num_epochs': 10, # number of training epochs (controls training time of NN models)
'learning_rate': ag.space.Real(1e-4, 1e-2, default=5e-4, log=True), # learning rate used in training (real-valued hyperparameter searched on log-scale)
'activation': ag.space.Categorical('relu', 'softrelu', 'tanh'), # activation function used in NN (categorical hyperparameter, default = first entry)
'layers': ag.space.Categorical([100],[1000],[200,100],[300,200,100]),
# Each choice for categorical hyperparameter 'layers' corresponds to list of sizes for each NN layer to use
'dropout_prob': ag.space.Real(0.0, 0.5, default=0.1), # dropout probability (real-valued hyperparameter)
}
gbm_options = { # specifies non-default hyperparameter values for lightGBM gradient boosted trees
'num_boost_round': 100, # number of boosting rounds (controls training time of GBM models)
'num_leaves': ag.space.Int(lower=26, upper=66, default=36), # number of leaves in trees (integer hyperparameter)
}
hyperparameters = {'NN': nn_options, 'GBM': gbm_options} # hyperparameters of each model type
# If one of these keys is missing from hyperparameters dict, then no models of that type are trained.
time_limits = 2*60 # train various models for ~2 min
num_trials = 5 # try at most 3 different hyperparameter configurations for each type of model
search_strategy = 'skopt' # to tune hyperparameters using SKopt Bayesian optimization routine
output_directory = 'agModels-predictOccupation' # folder where to store trained models
dir = 'agModels-predictClass-tuned' # specifies folder where to store trained models
predictor = task.fit(
train_data = train_data, #Données d'entraînement
label = label_column, #Variable objectif
tuning_data = None, #Données de vérification pour le réglage des hyperparamètres
output_directory = dir, #Chemin du dossier de stockage pour les modèles et les fichiers de génération intermédiaire
time_limits=time_limits, #Délai d'exécution(Unité: secondes)
num_trials=num_trials, #Nombre maximum d'ensembles d'hyperparamètres à essayer
hyperparameter_tune=True, #S'il faut régler les hyperparamètres. La valeur par défaut est False
hyperparameters=hyperparameters, #Spécification d'hyper paramètres
search_strategy=search_strategy #Comment rechercher un réglage d'hyper paramètre
)
Étant donné que le nombre d'hyperparamètres réglés par défaut pour chaque modèle est petit, il est nécessaire de spécifier les paramètres à régler pour chaque modèle. Consultez la référence API (https://autogluon.mxnet.io/api/autogluon.task.html) pour plus de détails. Comme indiqué dans l'exemple, cette fois, les paramètres de Neural Network et Light GBM sont spécifiés.
Warning: `hyperparameter_tune=True` is currently experimental and may cause the process to hang. Setting `auto_stack=True` instead is recommended to achieve maximum quality models.
Beginning AutoGluon training ... Time limit = 120s
AutoGluon will save models to agModels-predictClass-tuned/
Train Data Rows: 10000
Train Data Columns: 15
Preprocessing data ...
Here are the first 10 unique label values in your data: [' <=50K' ' >50K']
AutoGluon infers your prediction problem is: binary (because only two unique label-values observed)
If this is wrong, please specify `problem_type` argument in fit() instead (You may specify problem_type as one of: ['binary', 'multiclass', 'regression'])
Selected class <--> label mapping: class 1 = >50K, class 0 = <=50K
Feature Generator processed 10000 data points with 14 features
Original Features:
int features: 6
object features: 8
Generated Features:
int features: 0
All Features:
int features: 6
object features: 8
Data preprocessing and feature engineering runtime = 0.12s ...
AutoGluon will gauge predictive performance using evaluation metric: accuracy
To change this, specify the eval_metric argument of fit()
AutoGluon will early stop models using evaluation metric: accuracy
Starting Experiments
Num of Finished Tasks is 0
Num of Pending Tasks is 5
100%
5/5 [01:06<00:00, 13.34s/it]
Finished Task with config: {'feature_fraction': 1.0, 'learning_rate': 0.1, 'min_data_in_leaf': 20, 'num_leaves': 36} and reward: 0.859
Finished Task with config: {'feature_fraction': 0.7568829632019213, 'learning_rate': 0.12424356064985256, 'min_data_in_leaf': 3, 'num_leaves': 55} and reward: 0.858
Finished Task with config: {'feature_fraction': 0.7564494924988235, 'learning_rate': 0.03775715772264416, 'min_data_in_leaf': 8, 'num_leaves': 27} and reward: 0.859
Finished Task with config: {'feature_fraction': 0.9870314769908329, 'learning_rate': 0.1442122206611739, 'min_data_in_leaf': 4, 'num_leaves': 35} and reward: 0.857
Finished Task with config: {'feature_fraction': 0.9339535543959474, 'learning_rate': 0.0050486520525173835, 'min_data_in_leaf': 10, 'num_leaves': 56} and reward: 0.815
0.8645 = Validation accuracy score
1.44s = Training runtime
0.04s = Validation runtime
0.86 = Validation accuracy score
1.54s = Training runtime
0.03s = Validation runtime
0.862 = Validation accuracy score
1.4s = Training runtime
0.04s = Validation runtime
0.8605 = Validation accuracy score
1.33s = Training runtime
0.03s = Validation runtime
0.8155 = Validation accuracy score
1.61s = Training runtime
0.04s = Validation runtime
Starting Experiments
Num of Finished Tasks is 0
Num of Pending Tasks is 5
80%
4/5 [00:57<00:13, 13.95s/it]
Finished Task with config: {'activation.choice': 0, 'dropout_prob': 0.1, 'embedding_size_factor': 1.0, 'layers.choice': 0, 'learning_rate': 0.0005, 'network_type.choice': 0, 'use_batchnorm.choice': 0, 'weight_decay': 1e-06} and reward: 0.8465
Finished Task with config: {'activation.choice': 0, 'dropout_prob': 0.4983419677765833, 'embedding_size_factor': 1.1583623866868233, 'layers.choice': 0, 'learning_rate': 0.0068602771070335935, 'network_type.choice': 0, 'use_batchnorm.choice': 0, 'weight_decay': 0.0004137874852187468} and reward: 0.847
Ran out of time, stopping training early.
Finished Task with config: {'activation.choice': 2, 'dropout_prob': 0.23434709621043653, 'embedding_size_factor': 1.157370849535098, 'layers.choice': 1, 'learning_rate': 0.0024035089234857193, 'network_type.choice': 0, 'use_batchnorm.choice': 0, 'weight_decay': 3.3978628271485844e-09} and reward: 0.806
Please either provide filename or allow plot in get_training_curves
0.848 = Validation accuracy score
23.43s = Training runtime
0.57s = Validation runtime
0.8475 = Validation accuracy score
21.99s = Training runtime
0.31s = Validation runtime
0.806 = Validation accuracy score
9.18s = Training runtime
0.65s = Validation runtime
Fitting model: weighted_ensemble_k0_l1 ... Training model for up to 119.88s of the 51.12s of remaining time.
0.8645 = Validation accuracy score
0.8s = Training runtime
0.0s = Validation runtime
AutoGluon training complete, total runtime = 69.75s ...
CPU times: user 53.8 s, sys: 6.07 s, total: 59.9 s
Wall time: 1min 9s
Le résultat de l'ajustement est le suivant.
results = predictor.fit_summary()
*** Summary of fit() ***
Estimated performance of each model:
model score_val fit_time pred_time_val stack_level
8 weighted_ensemble_k0_l1 0.8645 0.804953 0.001838 1
0 LightGBMClassifier/trial_15 0.8645 1.438680 0.037270 0
2 LightGBMClassifier/trial_17 0.8620 1.400933 0.039980 0
3 LightGBMClassifier/trial_18 0.8605 1.325390 0.030934 0
1 LightGBMClassifier/trial_16 0.8600 1.536028 0.026618 0
5 NeuralNetClassifier/trial_20 0.8480 23.431652 0.566203 0
6 NeuralNetClassifier/trial_21 0.8475 21.988767 0.310336 0
4 LightGBMClassifier/trial_19 0.8155 1.610676 0.038171 0
7 NeuralNetClassifier/trial_22 0.8060 9.177221 0.650193 0
Number of models trained: 9
Types of models trained:
{'WeightedEnsembleModel', 'LGBModel', 'TabularNeuralNetModel'}
Bagging used: False
Stack-ensembling used: False
Hyperparameter-tuning used: True
User-specified hyperparameters:
{'NN': {'num_epochs': 10, 'learning_rate': Real: lower=0.0001, upper=0.01, 'activation': Categorical['relu', 'softrelu', 'tanh'], 'layers': Categorical[[100], [1000], [200, 100], [300, 200, 100]], 'dropout_prob': Real: lower=0.0, upper=0.5}, 'GBM': {'num_boost_round': 100, 'num_leaves': Int: lower=26, upper=66}}
Plot summary of models saved to file: agModels-predictClass-tuned/SummaryOfModels.html
Plot summary of models saved to file: agModels-predictClass-tuned/LightGBMClassifier_HPOmodelsummary.html
Plot summary of models saved to file: LightGBMClassifier_HPOmodelsummary.html
Plot of HPO performance saved to file: agModels-predictClass-tuned/LightGBMClassifier_HPOperformanceVStrials.png
Calculons la précision des données de test.
y_pred = predictor.predict(test_data_nolab)
print("Predictions: ", y_pred)
perf = predictor.evaluate_predictions(y_true=y_test, y_pred=y_pred, auxiliary_metrics=True)
Evaluation: accuracy on test data: 0.8688709182106664
Evaluations on test data:
{
"accuracy": 0.8688709182106664,
"accuracy_score": 0.8688709182106664,
"balanced_accuracy_score": 0.7895131714141826,
"matthews_corrcoef": 0.6195102922288485,
"f1_score": 0.8688709182106664
}
Predictions: [' <=50K' ' <=50K' ' >50K' ... ' <=50K' ' <=50K' ' <=50K']
Detailed (per-class) classification report:
{
" <=50K": {
"precision": 0.8931939841957686,
"recall": 0.9405448933029124,
"f1-score": 0.9162580898215336,
"support": 7451
},
" >50K": {
"precision": 0.7696307852314093,
"recall": 0.6384814495254529,
"f1-score": 0.6979485970290026,
"support": 2318
},
"accuracy": 0.8688709182106664,
"macro avg": {
"precision": 0.8314123847135889,
"recall": 0.7895131714141826,
"f1-score": 0.8071033434252681,
"support": 9769
},
"weighted avg": {
"precision": 0.8638747606110224,
"recall": 0.8688709182106664,
"f1-score": 0.8644573523567893,
"support": 9769
}
Lorsque AutoStack est activé
Si vous activez l'option ʻauto_stack, l'assemblage de la pile multicouche sera exécuté. Une note est donnée au bas de l'exemple de code pour cette option ʻauto-stack.
Le plus inquiétant est que je n'active pas l'option de réglage des hyper paramètres.
En fait, j'ai pensé que j'aimerais assembler des modèles individuels tout en réglant les hyperparamètres, mais il semble que ce ne soit pas recommandé pour le moment.
https://autogluon.mxnet.io/tutorials/tabular_prediction/tabular-indepth.html#maximizing-predictive-performance
%%time
long_time = 30*60 # for quick demonstration only, you should set this to longest time you are willing to wait
dir = 'agModels-predictClass-autostack' # specifies folder where to store trained models
predictor = task.fit(
train_data=train_data,
label=label_column,
auto_stack=True,
output_directory = dir,
time_limits=long_time)
Beginning AutoGluon training ... Time limit = 1800s
AutoGluon will save models to agModels-predictClass-autostack/
Train Data Rows: 10000
Train Data Columns: 15
Preprocessing data ...
Here are the first 10 unique label values in your data: [' <=50K' ' >50K']
AutoGluon infers your prediction problem is: binary (because only two unique label-values observed)
If this is wrong, please specify `problem_type` argument in fit() instead (You may specify problem_type as one of: ['binary', 'multiclass', 'regression'])
Selected class <--> label mapping: class 1 = >50K, class 0 = <=50K
Feature Generator processed 10000 data points with 14 features
Original Features:
int features: 6
object features: 8
Generated Features:
int features: 0
All Features:
int features: 6
object features: 8
Data preprocessing and feature engineering runtime = 0.1s ...
AutoGluon will gauge predictive performance using evaluation metric: accuracy
To change this, specify the eval_metric argument of fit()
AutoGluon will early stop models using evaluation metric: accuracy
Fitting model: RandomForestClassifierGini_STACKER_l0 ... Training model for up to 899.95s of the 1799.89s of remaining time.
0.8571 = Validation accuracy score
20.36s = Training runtime
1.13s = Validation runtime
Fitting model: RandomForestClassifierEntr_STACKER_l0 ... Training model for up to 876.77s of the 1776.72s of remaining time.
0.859 = Validation accuracy score
25.58s = Training runtime
1.34s = Validation runtime
Fitting model: ExtraTreesClassifierGini_STACKER_l0 ... Training model for up to 847.93s of the 1747.87s of remaining time.
0.8486 = Validation accuracy score
16.65s = Training runtime
2.13s = Validation runtime
Fitting model: ExtraTreesClassifierEntr_STACKER_l0 ... Training model for up to 824.45s of the 1724.4s of remaining time.
0.8478 = Validation accuracy score
18.99s = Training runtime
2.14s = Validation runtime
Fitting model: KNeighborsClassifierUnif_STACKER_l0 ... Training model for up to 799.25s of the 1699.2s of remaining time.
0.7694 = Validation accuracy score
0.33s = Training runtime
1.11s = Validation runtime
Fitting model: KNeighborsClassifierDist_STACKER_l0 ... Training model for up to 797.76s of the 1697.7s of remaining time.
0.751 = Validation accuracy score
0.3s = Training runtime
1.11s = Validation runtime
Fitting model: LightGBMClassifier_STACKER_l0 ... Training model for up to 796.29s of the 1696.24s of remaining time.
0.874 = Validation accuracy score
11.52s = Training runtime
0.17s = Validation runtime
Fitting model: CatboostClassifier_STACKER_l0 ... Training model for up to 784.49s of the 1684.44s of remaining time.
0.8735 = Validation accuracy score
54.41s = Training runtime
0.13s = Validation runtime
Fitting model: NeuralNetClassifier_STACKER_l0 ... Training model for up to 729.9s of the 1629.85s of remaining time.
Ran out of time, stopping training early.
Ran out of time, stopping training early.
Ran out of time, stopping training early.
Ran out of time, stopping training early.
0.8591 = Validation accuracy score
641.59s = Training runtime
3.02s = Validation runtime
Fitting model: LightGBMClassifierCustom_STACKER_l0 ... Training model for up to 85.08s of the 985.02s of remaining time.
0.8673 = Validation accuracy score
23.17s = Training runtime
0.28s = Validation runtime
Completed 1/20 k-fold bagging repeats ...
Fitting model: weighted_ensemble_k0_l1 ... Training model for up to 360.0s of the 960.22s of remaining time.
0.874 = Validation accuracy score
3.57s = Training runtime
0.0s = Validation runtime
Fitting model: RandomForestClassifierGini_STACKER_l1 ... Training model for up to 956.64s of the 956.63s of remaining time.
0.873 = Validation accuracy score
32.32s = Training runtime
1.76s = Validation runtime
Fitting model: RandomForestClassifierEntr_STACKER_l1 ... Training model for up to 921.46s of the 921.45s of remaining time.
0.8745 = Validation accuracy score
45.88s = Training runtime
1.36s = Validation runtime
Fitting model: ExtraTreesClassifierGini_STACKER_l1 ... Training model for up to 873.32s of the 873.31s of remaining time.
0.871 = Validation accuracy score
17.69s = Training runtime
2.16s = Validation runtime
Fitting model: ExtraTreesClassifierEntr_STACKER_l1 ... Training model for up to 850.66s of the 850.65s of remaining time.
0.8703 = Validation accuracy score
20.02s = Training runtime
2.15s = Validation runtime
Fitting model: KNeighborsClassifierUnif_STACKER_l1 ... Training model for up to 825.65s of the 825.64s of remaining time.
0.7685 = Validation accuracy score
0.49s = Training runtime
1.13s = Validation runtime
Fitting model: KNeighborsClassifierDist_STACKER_l1 ... Training model for up to 823.94s of the 823.93s of remaining time.
0.7494 = Validation accuracy score
0.41s = Training runtime
1.13s = Validation runtime
Fitting model: LightGBMClassifier_STACKER_l1 ... Training model for up to 822.3s of the 822.3s of remaining time.
0.8783 = Validation accuracy score
12.55s = Training runtime
0.18s = Validation runtime
Fitting model: CatboostClassifier_STACKER_l1 ... Training model for up to 809.49s of the 809.48s of remaining time.
0.878 = Validation accuracy score
46.66s = Training runtime
0.15s = Validation runtime
Fitting model: NeuralNetClassifier_STACKER_l1 ... Training model for up to 762.64s of the 762.63s of remaining time.
Ran out of time, stopping training early.
0.873 = Validation accuracy score
543.08s = Training runtime
3.31s = Validation runtime
Fitting model: LightGBMClassifierCustom_STACKER_l1 ... Training model for up to 216.03s of the 216.03s of remaining time.
0.8741 = Validation accuracy score
25.99s = Training runtime
0.21s = Validation runtime
Completed 1/20 k-fold bagging repeats ...
Fitting model: weighted_ensemble_k0_l2 ... Training model for up to 360.0s of the 189.19s of remaining time.
0.8784 = Validation accuracy score
3.56s = Training runtime
0.0s = Validation runtime
AutoGluon training complete, total runtime = 1614.4s ...
CPU times: user 22min 10s, sys: 1min 8s, total: 23min 19s
Wall time: 26min 54s
De même, lors du calcul de la précision des données de test, la précision était d'environ 0,871.
y_pred = predictor.predict(test_data_nolab)
print("Predictions: ", y_pred)
perf = predictor.evaluate_predictions(y_true=y_test, y_pred=y_pred, auxiliary_metrics=True)
Evaluation: accuracy on test data: 0.8705087521752483
Evaluations on test data:
{
"accuracy": 0.8705087521752483,
"accuracy_score": 0.8705087521752483,
"balanced_accuracy_score": 0.7893980679524981,
"matthews_corrcoef": 0.6232120872465466,
"f1_score": 0.8705087521752483
}
Predictions: [' <=50K' ' <=50K' ' >50K' ... ' <=50K' ' <=50K' ' <=50K']
Detailed (per-class) classification report:
{
" <=50K": {
"precision": 0.8926123381568926,
"recall": 0.9437659374580594,
"f1-score": 0.9174766781916628,
"support": 7451
},
" >50K": {
"precision": 0.7784241142252777,
"recall": 0.635030198446937,
"f1-score": 0.6994535519125684,
"support": 2318
},
"accuracy": 0.8705087521752483,
"macro avg": {
"precision": 0.8355182261910852,
"recall": 0.7893980679524981,
"f1-score": 0.8084651150521156,
"support": 9769
},
"weighted avg": {
"precision": 0.8655176198568123,
"recall": 0.8705087521752483,
"f1-score": 0.8657438901156119,
"support": 9769
}
}
Lorsque l'index est modifié
Vous pouvez sélectionner n'importe quel index de votre choix pour l'argument de ʻeval_metric of fit`.
La valeur par défaut est la précision pour la classification binaire.
%%time
dir = 'agModels-predictClass-defaultlogloss' # specifies folder where to store trained models
predictor = task.fit(train_data=train_data, label=label_column, eval_metric='log_loss', output_directory=dir)
Quand j'ai essayé log_loss, j'ai reçu l'avertissement d'exécution suivant.
Il semble que cela fonctionne bien pour certains modèles, mais je ne suis pas sûr que cela fonctionne à la fin ...
/usr/local/lib/python3.6/dist-packages/sklearn/metrics/_classification.py:2295: RuntimeWarning: divide by zero encountered in log
loss = -(transformed_labels * np.log(y_pred)).sum(axis=1)
/usr/local/lib/python3.6/dist-packages/sklearn/metrics/_classification.py:2295: RuntimeWarning: invalid value encountered in multiply
loss = -(transformed_labels * np.log(y_pred)).sum(axis=1)
Lorsque la quantité de caractéristiques est sélectionnée
L'un des arguments de fit était feature_prune, alors je l'ai essayé.
Ci-dessous le code.
%%time
dir = 'agModels-predictClass-defaultprune' # specifies folder where to store trained models
predictor = task.fit(train_data=train_data, label=label_column, feature_prune=True, output_directory=dir)
Immédiatement après son exécution, l'avertissement suivant a été émis. Cela ne semble pas encore fonctionner.
Warning: feature_prune does not currently work, setting to False.
Résumé
J'ai essayé l'exemple de code officiel et quelques options d'argument. Il semble y avoir des choses qui ne fonctionnent pas, donc j'attends avec impatience les futures mises à jour.
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