Questions marquées «sentiment-analysis»

29
Pourquoi xgboost est-il tellement plus rapide que sklearn GradientBoostingClassifier?

J'essaie de former un modèle d'augmentation de gradient sur plus de 50k exemples avec 100 fonctionnalités numériques. XGBClassifiergère 500 arbres en 43 secondes sur ma machine, alors qu'il GradientBoostingClassifierne gère que 10 arbres (!) en 1 minute et 2 secondes :( Je n'ai pas pris la peine...

scikit-learn xgboost gbm data-mining classification data-cleaning machine-learning reinforcement-learning data-mining bigdata dataset nlp language-model stanford-nlp machine-learning neural-network deep-learning randomized-algorithms machine-learning beginner career xgboost loss-function neural-network software-recommendation naive-bayes-classifier classification scikit-learn feature-selection r random-forest cross-validation data-mining python scikit-learn random-forest churn python clustering k-means machine-learning nlp sentiment-analysis machine-learning programming python scikit-learn nltk gensim visualization data csv neural-network deep-learning descriptive-statistics machine-learning supervised-learning text-mining orange data parameter-estimation python pandas scraping r clustering k-means unsupervised-learning
18
PNL - pourquoi «n'est pas» un mot d'arrêt?

J'essaie de supprimer les mots vides avant d'effectuer la modélisation du sujet. J'ai remarqué que certains mots de négation (pas, ni, jamais, aucun, etc.) sont généralement considérés comme des mots vides. Par exemple, NLTK, spacy et sklearn incluent "not" dans leurs listes de mots vides....

nlp topic-model sentiment-analysis
16
agrandir la carte thermique de Seaborn

Je crée un corr()df à partir d'un df d'origine. Le corr()df est sorti 70 X 70 et il est impossible de visualiser le heatmap ... sns.heatmap(df). Si j'essaie d'afficher le corr = df.corr(), le tableau ne correspond pas à l'écran et je peux voir toutes les corrélations. Est-ce un moyen d'imprimer...

visualization pandas plotting machine-learning neural-network svm decision-trees svm efficiency python linear-regression machine-learning nlp topic-model lda named-entity-recognition naive-bayes-classifier association-rules fuzzy-logic kaggle deep-learning tensorflow inception classification feature-selection feature-engineering machine-learning scikit-learn tensorflow keras encoding nlp text-mining nlp rnn python neural-network feature-extraction machine-learning predictive-modeling python r linear-regression clustering r ggplot2 neural-network neural-network training python neural-network deep-learning rnn predictive-modeling databases sql programming distribution dataset cross-validation neural-network deep-learning rnn machine-learning machine-learning python deep-learning data-mining tensorflow visualization tools sql embeddings orange feature-extraction unsupervised-learning gan machine-learning python data-mining pandas machine-learning data-mining bigdata apache-spark apache-hadoop deep-learning python convnet keras aggregation clustering k-means r random-forest decision-trees reference-request visualization data pandas plotting neural-network keras rnn theano deep-learning tensorflow inception predictive-modeling deep-learning regression sentiment-analysis nlp encoding deep-learning python scikit-learn lda convnet keras predictive-modeling regression overfitting regression svm prediction machine-learning similarity word2vec information-retrieval word-embeddings neural-network deep-learning rnn
12
Combien de cellules LSTM dois-je utiliser?

Existe-t-il des règles générales (ou des règles réelles) concernant la quantité minimale, maximale et "raisonnable" de cellules LSTM que je devrais utiliser? Plus précisément, je me rapporte à BasicLSTMCell de TensorFlow et à la num_unitspropriété. Veuillez supposer que j'ai un problème de...

rnn machine-learning r predictive-modeling random-forest python language-model sentiment-analysis encoding machine-learning deep-learning neural-network dataset caffe classification xgboost multiclass-classification unbalanced-classes time-series descriptive-statistics python r clustering machine-learning python deep-learning tensorflow machine-learning python predictive-modeling probability scikit-learn svm machine-learning python classification gradient-descent regression research python neural-network deep-learning convnet keras python tensorflow machine-learning deep-learning tensorflow python r bigdata visualization rstudio pandas pyspark dataset time-series multilabel-classification machine-learning neural-network ensemble-modeling kaggle machine-learning linear-regression cnn convnet machine-learning tensorflow association-rules machine-learning predictive-modeling training model-selection neural-network keras deep-learning deep-learning convnet image-classification predictive-modeling prediction machine-learning python classification predictive-modeling scikit-learn machine-learning python random-forest sampling training recommender-system books python neural-network nlp deep-learning tensorflow python matlab information-retrieval search search-engine deep-learning convnet keras machine-learning python cross-validation sampling machine-learning
10
Meilleures langues pour le calcul scientifique [fermé]

Fermé . Cette question doit être plus ciblée . Il n'accepte pas actuellement les réponses. Voulez-vous améliorer cette question? Mettez à jour la question afin qu'elle se concentre sur un problème uniquement en modifiant ce message . Fermé il y a 5 ans . Il semble que la plupart des langues...

efficiency statistics tools knowledge-base machine-learning neural-network deep-learning optimization hyperparameter machine-learning time-series categorical-data logistic-regression python visualization bigdata efficiency classification binary svm random-forest logistic-regression data-mining sql experiments bigdata efficiency performance scalability distributed bigdata nlp statistics education knowledge-base definitions machine-learning recommender-system evaluation efficiency algorithms parameter efficiency scalability sql statistics visualization knowledge-base education machine-learning r python r text-mining sentiment-analysis machine-learning machine-learning python neural-network statistics reference-request machine-learning data-mining python classification data-mining bigdata usecase apache-hadoop map-reduce aws education feature-selection machine-learning machine-learning sports data-formats hierarchical-data-format bigdata apache-hadoop bigdata apache-hadoop python visualization knowledge-base classification confusion-matrix accuracy bigdata apache-hadoop bigdata efficiency apache-hadoop distributed machine-translation nlp metadata data-cleaning text-mining python pandas machine-learning python pandas scikit-learn bigdata machine-learning databases clustering data-mining recommender-system