Pertanyaan yang diberi tag sentiment-analysis

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Mengapa xgboost jauh lebih cepat daripada sklearn GradientBoostingClassifier?

Saya mencoba untuk melatih model peningkatan gradien lebih dari 50k contoh dengan 100 fitur numerik. XGBClassifiermenangani 500 pohon dalam waktu 43 detik pada mesin saya, sementara GradientBoostingClassifierhanya menangani 10 pohon (!) dalam 1 menit dan 2 detik :( Saya tidak repot-repot mencoba...

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
NLP - mengapa "bukan" kata yang berhenti?

Saya mencoba untuk menghapus kata-kata berhenti sebelum melakukan pemodelan topik. Saya perhatikan bahwa beberapa kata negasi (tidak, tidak, tidak, tidak ada, dll.) Biasanya dianggap sebagai kata-kata berhenti. Misalnya, NLTK, spacy dan sklearn menyertakan "tidak" pada daftar kata stop mereka....

nlp topic-model sentiment-analysis
16
membuat peta panas seaborn lebih besar

Saya membuat corr()df dari df asli. The corr()df keluar 70 X 70 dan tidak mungkin untuk memvisualisasikan heatmap tersebut ... sns.heatmap(df). Jika saya mencoba untuk menampilkan corr = df.corr(), tabel tidak cocok dengan layar dan saya bisa melihat semua korelasinya. Apakah ini cara untuk...

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
Berapa banyak sel LSTM yang harus saya gunakan?

Apakah ada aturan praktis (atau aturan aktual) yang berkaitan dengan jumlah sel LSTM minimum, maksimum, dan "wajar" yang harus saya gunakan? Secara khusus saya berhubungan dengan BasicLSTMCell dari TensorFlow dan num_unitsproperti. Harap asumsikan bahwa saya memiliki masalah klasifikasi yang...

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
Bahasa terbaik untuk komputasi ilmiah [ditutup]

Ditutup . Pertanyaan ini perlu lebih fokus . Saat ini tidak menerima jawaban. Ingin meningkatkan pertanyaan ini? Perbarui pertanyaan sehingga berfokus pada satu masalah hanya dengan mengedit posting ini . Ditutup 5 tahun yang lalu . Sepertinya sebagian...

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