openml-datasets

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/core/openml-datasets/
https://datahub.io/core/openml-datasets/_r/-/FRESHNESS_CHECK.md
https://datahub.io/core/openml-datasets/_r/-/README.md
https://datahub.io/core/openml-datasets/_r/-/UPDATE_SCRIPT_MAINTENANCE_REPORT.md
https://datahub.io/core/openml-datasets/_r/-/data/Bioresponse/Bioresponse.arff
https://datahub.io/core/openml-datasets/_r/-/data/Bioresponse/Bioresponse.csv
https://datahub.io/core/openml-datasets/_r/-/data/Bioresponse/README.md
https://datahub.io/core/openml-datasets/_r/-/data/Bioresponse/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/Click_prediction_small/Click_prediction_small.arff
https://datahub.io/core/openml-datasets/_r/-/data/Click_prediction_small/Click_prediction_small.csv
https://datahub.io/core/openml-datasets/_r/-/data/Click_prediction_small/README.md
https://datahub.io/core/openml-datasets/_r/-/data/Click_prediction_small/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/IMDB.drama/IMDB.drama.arff
https://datahub.io/core/openml-datasets/_r/-/data/IMDB.drama/IMDB.drama.csv
https://datahub.io/core/openml-datasets/_r/-/data/IMDB.drama/README.md
https://datahub.io/core/openml-datasets/_r/-/data/IMDB.drama/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/MagicTelescope/MagicTelescope.arff
https://datahub.io/core/openml-datasets/_r/-/data/MagicTelescope/MagicTelescope.csv
https://datahub.io/core/openml-datasets/_r/-/data/MagicTelescope/README.md
https://datahub.io/core/openml-datasets/_r/-/data/MagicTelescope/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/Satellite/README.md
https://datahub.io/core/openml-datasets/_r/-/data/Satellite/Satellite.arff
https://datahub.io/core/openml-datasets/_r/-/data/Satellite/Satellite.csv
https://datahub.io/core/openml-datasets/_r/-/data/Satellite/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/SpeedDating/README.md
https://datahub.io/core/openml-datasets/_r/-/data/SpeedDating/SpeedDating.arff
https://datahub.io/core/openml-datasets/_r/-/data/SpeedDating/SpeedDating.csv
https://datahub.io/core/openml-datasets/_r/-/data/SpeedDating/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/abalone/README.md
https://datahub.io/core/openml-datasets/_r/-/data/abalone/abalone.arff
https://datahub.io/core/openml-datasets/_r/-/data/abalone/abalone.csv
https://datahub.io/core/openml-datasets/_r/-/data/abalone/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/adult/README.md
https://datahub.io/core/openml-datasets/_r/-/data/adult/adult.arff
https://datahub.io/core/openml-datasets/_r/-/data/adult/adult.csv
https://datahub.io/core/openml-datasets/_r/-/data/adult/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/airlines/README.md
https://datahub.io/core/openml-datasets/_r/-/data/airlines/airlines.arff
https://datahub.io/core/openml-datasets/_r/-/data/airlines/airlines.csv
https://datahub.io/core/openml-datasets/_r/-/data/airlines/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/amazon-commerce-reviews/README.md
https://datahub.io/core/openml-datasets/_r/-/data/amazon-commerce-reviews/amazon-commerce-reviews.arff
https://datahub.io/core/openml-datasets/_r/-/data/amazon-commerce-reviews/amazon-commerce-reviews.csv
https://datahub.io/core/openml-datasets/_r/-/data/amazon-commerce-reviews/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/anneal/README.md
https://datahub.io/core/openml-datasets/_r/-/data/anneal/anneal.arff
https://datahub.io/core/openml-datasets/_r/-/data/anneal/anneal.csv
https://datahub.io/core/openml-datasets/_r/-/data/anneal/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/arrhythmia/README.md
https://datahub.io/core/openml-datasets/_r/-/data/arrhythmia/arrhythmia.arff
https://datahub.io/core/openml-datasets/_r/-/data/arrhythmia/arrhythmia.csv
https://datahub.io/core/openml-datasets/_r/-/data/arrhythmia/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/autoUniv-au6-1000/README.md
https://datahub.io/core/openml-datasets/_r/-/data/autoUniv-au6-1000/autoUniv-au6-1000.arff
https://datahub.io/core/openml-datasets/_r/-/data/autoUniv-au6-1000/autoUniv-au6-1000.csv
https://datahub.io/core/openml-datasets/_r/-/data/autoUniv-au6-1000/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/autos/README.md
https://datahub.io/core/openml-datasets/_r/-/data/autos/autos.arff
https://datahub.io/core/openml-datasets/_r/-/data/autos/autos.csv
https://datahub.io/core/openml-datasets/_r/-/data/autos/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/bank-marketing/README.md
https://datahub.io/core/openml-datasets/_r/-/data/bank-marketing/bank-marketing.arff
https://datahub.io/core/openml-datasets/_r/-/data/bank-marketing/bank-marketing.csv
https://datahub.io/core/openml-datasets/_r/-/data/bank-marketing/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/banknote-authentication/README.md
https://datahub.io/core/openml-datasets/_r/-/data/banknote-authentication/banknote-authentication.arff
https://datahub.io/core/openml-datasets/_r/-/data/banknote-authentication/banknote-authentication.csv
https://datahub.io/core/openml-datasets/_r/-/data/banknote-authentication/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/blood-transfusion-service-center/README.md
https://datahub.io/core/openml-datasets/_r/-/data/blood-transfusion-service-center/blood-transfusion-service-center.arff
https://datahub.io/core/openml-datasets/_r/-/data/blood-transfusion-service-center/blood-transfusion-service-center.csv
https://datahub.io/core/openml-datasets/_r/-/data/blood-transfusion-service-center/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/breast-cancer/README.md
https://datahub.io/core/openml-datasets/_r/-/data/breast-cancer/breast-cancer.arff
https://datahub.io/core/openml-datasets/_r/-/data/breast-cancer/breast-cancer.csv
https://datahub.io/core/openml-datasets/_r/-/data/breast-cancer/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/breast-w/README.md
https://datahub.io/core/openml-datasets/_r/-/data/breast-w/breast-w.arff
https://datahub.io/core/openml-datasets/_r/-/data/breast-w/breast-w.csv
https://datahub.io/core/openml-datasets/_r/-/data/breast-w/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/cardiotocography/README.md
https://datahub.io/core/openml-datasets/_r/-/data/cardiotocography/cardiotocography.arff
https://datahub.io/core/openml-datasets/_r/-/data/cardiotocography/cardiotocography.csv
https://datahub.io/core/openml-datasets/_r/-/data/cardiotocography/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/climate-model-simulation-crashes/README.md
https://datahub.io/core/openml-datasets/_r/-/data/climate-model-simulation-crashes/climate-model-simulation-crashes.arff
https://datahub.io/core/openml-datasets/_r/-/data/climate-model-simulation-crashes/climate-model-simulation-crashes.csv
https://datahub.io/core/openml-datasets/_r/-/data/climate-model-simulation-crashes/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/cmc/README.md
https://datahub.io/core/openml-datasets/_r/-/data/cmc/cmc.arff
https://datahub.io/core/openml-datasets/_r/-/data/cmc/cmc.csv
https://datahub.io/core/openml-datasets/_r/-/data/cmc/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/credit-approval/README.md
https://datahub.io/core/openml-datasets/_r/-/data/credit-approval/credit-approval.arff
https://datahub.io/core/openml-datasets/_r/-/data/credit-approval/credit-approval.csv
https://datahub.io/core/openml-datasets/_r/-/data/credit-approval/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/credit-g/README.md
https://datahub.io/core/openml-datasets/_r/-/data/credit-g/credit-g.arff
https://datahub.io/core/openml-datasets/_r/-/data/credit-g/credit-g.csv
https://datahub.io/core/openml-datasets/_r/-/data/credit-g/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/diabetes/README.md
https://datahub.io/core/openml-datasets/_r/-/data/diabetes/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/diabetes/diabetes.arff
https://datahub.io/core/openml-datasets/_r/-/data/diabetes/diabetes.csv
https://datahub.io/core/openml-datasets/_r/-/data/eeg-eye-state/README.md
https://datahub.io/core/openml-datasets/_r/-/data/eeg-eye-state/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/eeg-eye-state/eeg-eye-state.arff
https://datahub.io/core/openml-datasets/_r/-/data/eeg-eye-state/eeg-eye-state.csv
https://datahub.io/core/openml-datasets/_r/-/data/electricity/README.md
https://datahub.io/core/openml-datasets/_r/-/data/electricity/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/electricity/electricity.arff
https://datahub.io/core/openml-datasets/_r/-/data/electricity/electricity.csv
https://datahub.io/core/openml-datasets/_r/-/data/fbis.wc/README.md
https://datahub.io/core/openml-datasets/_r/-/data/fbis.wc/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/fbis.wc/fbis.wc.arff
https://datahub.io/core/openml-datasets/_r/-/data/fbis.wc/fbis.wc.csv
https://datahub.io/core/openml-datasets/_r/-/data/first-order-theorem-proving/README.md
https://datahub.io/core/openml-datasets/_r/-/data/first-order-theorem-proving/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/first-order-theorem-proving/first-order-theorem-proving.arff
https://datahub.io/core/openml-datasets/_r/-/data/first-order-theorem-proving/first-order-theorem-proving.csv
https://datahub.io/core/openml-datasets/_r/-/data/gas-drift/README.md
https://datahub.io/core/openml-datasets/_r/-/data/gas-drift/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/gas-drift/gas-drift.arff
https://datahub.io/core/openml-datasets/_r/-/data/gas-drift/gas-drift.csv
https://datahub.io/core/openml-datasets/_r/-/data/gina_agnostic/README.md
https://datahub.io/core/openml-datasets/_r/-/data/gina_agnostic/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/gina_agnostic/gina_agnostic.arff
https://datahub.io/core/openml-datasets/_r/-/data/gina_agnostic/gina_agnostic.csv
https://datahub.io/core/openml-datasets/_r/-/data/gina_prior2/README.md
https://datahub.io/core/openml-datasets/_r/-/data/gina_prior2/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/gina_prior2/gina_prior2.arff
https://datahub.io/core/openml-datasets/_r/-/data/gina_prior2/gina_prior2.csv
https://datahub.io/core/openml-datasets/_r/-/data/glass/README.md
https://datahub.io/core/openml-datasets/_r/-/data/glass/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/glass/glass.arff
https://datahub.io/core/openml-datasets/_r/-/data/glass/glass.csv
https://datahub.io/core/openml-datasets/_r/-/data/haberman/README.md
https://datahub.io/core/openml-datasets/_r/-/data/haberman/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/haberman/haberman.arff
https://datahub.io/core/openml-datasets/_r/-/data/haberman/haberman.csv
https://datahub.io/core/openml-datasets/_r/-/data/heart-statlog/README.md
https://datahub.io/core/openml-datasets/_r/-/data/heart-statlog/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/heart-statlog/heart-statlog.arff
https://datahub.io/core/openml-datasets/_r/-/data/heart-statlog/heart-statlog.csv
https://datahub.io/core/openml-datasets/_r/-/data/hill-valley/README.md
https://datahub.io/core/openml-datasets/_r/-/data/hill-valley/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/hill-valley/hill-valley.arff
https://datahub.io/core/openml-datasets/_r/-/data/hill-valley/hill-valley.csv
https://datahub.io/core/openml-datasets/_r/-/data/ilpd/README.md
https://datahub.io/core/openml-datasets/_r/-/data/ilpd/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/ilpd/ilpd.arff
https://datahub.io/core/openml-datasets/_r/-/data/ilpd/ilpd.csv
https://datahub.io/core/openml-datasets/_r/-/data/ionosphere/README.md
https://datahub.io/core/openml-datasets/_r/-/data/ionosphere/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/ionosphere/ionosphere.arff
https://datahub.io/core/openml-datasets/_r/-/data/ionosphere/ionosphere.csv
https://datahub.io/core/openml-datasets/_r/-/data/iris/README.md
https://datahub.io/core/openml-datasets/_r/-/data/iris/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/iris/iris.arff
https://datahub.io/core/openml-datasets/_r/-/data/iris/iris.csv
https://datahub.io/core/openml-datasets/_r/-/data/isolet/README.md
https://datahub.io/core/openml-datasets/_r/-/data/isolet/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/isolet/isolet.arff
https://datahub.io/core/openml-datasets/_r/-/data/isolet/isolet.csv
https://datahub.io/core/openml-datasets/_r/-/data/jm1/README.md
https://datahub.io/core/openml-datasets/_r/-/data/jm1/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/jm1/jm1.arff
https://datahub.io/core/openml-datasets/_r/-/data/jm1/jm1.csv
https://datahub.io/core/openml-datasets/_r/-/data/kc1/README.md
https://datahub.io/core/openml-datasets/_r/-/data/kc1/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/kc1/kc1.arff
https://datahub.io/core/openml-datasets/_r/-/data/kc1/kc1.csv
https://datahub.io/core/openml-datasets/_r/-/data/kc2/README.md
https://datahub.io/core/openml-datasets/_r/-/data/kc2/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/kc2/kc2.arff
https://datahub.io/core/openml-datasets/_r/-/data/kc2/kc2.csv
https://datahub.io/core/openml-datasets/_r/-/data/kr-vs-kp/README.md
https://datahub.io/core/openml-datasets/_r/-/data/kr-vs-kp/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/kr-vs-kp/kr-vs-kp.arff
https://datahub.io/core/openml-datasets/_r/-/data/kr-vs-kp/kr-vs-kp.csv
https://datahub.io/core/openml-datasets/_r/-/data/kropt/README.md
https://datahub.io/core/openml-datasets/_r/-/data/kropt/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/kropt/kropt.arff
https://datahub.io/core/openml-datasets/_r/-/data/kropt/kropt.csv
https://datahub.io/core/openml-datasets/_r/-/data/letter/README.md
https://datahub.io/core/openml-datasets/_r/-/data/letter/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/letter/letter.arff
https://datahub.io/core/openml-datasets/_r/-/data/letter/letter.csv
https://datahub.io/core/openml-datasets/_r/-/data/liver-disorders/README.md
https://datahub.io/core/openml-datasets/_r/-/data/liver-disorders/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/liver-disorders/liver-disorders.arff
https://datahub.io/core/openml-datasets/_r/-/data/liver-disorders/liver-disorders.csv
https://datahub.io/core/openml-datasets/_r/-/data/lung-cancer/README.md
https://datahub.io/core/openml-datasets/_r/-/data/lung-cancer/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/lung-cancer/lung-cancer.arff
https://datahub.io/core/openml-datasets/_r/-/data/lung-cancer/lung-cancer.csv
https://datahub.io/core/openml-datasets/_r/-/data/lymph/README.md
https://datahub.io/core/openml-datasets/_r/-/data/lymph/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/lymph/lymph.arff
https://datahub.io/core/openml-datasets/_r/-/data/lymph/lymph.csv
https://datahub.io/core/openml-datasets/_r/-/data/madelon/README.md
https://datahub.io/core/openml-datasets/_r/-/data/madelon/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/madelon/madelon.arff
https://datahub.io/core/openml-datasets/_r/-/data/madelon/madelon.csv
https://datahub.io/core/openml-datasets/_r/-/data/mammography/README.md
https://datahub.io/core/openml-datasets/_r/-/data/mammography/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/mammography/mammography.arff
https://datahub.io/core/openml-datasets/_r/-/data/mammography/mammography.csv
https://datahub.io/core/openml-datasets/_r/-/data/mfeat-factors/README.md
https://datahub.io/core/openml-datasets/_r/-/data/mfeat-factors/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/mfeat-factors/mfeat-factors.arff
https://datahub.io/core/openml-datasets/_r/-/data/mfeat-factors/mfeat-factors.csv
https://datahub.io/core/openml-datasets/_r/-/data/mfeat-karhunen/README.md
https://datahub.io/core/openml-datasets/_r/-/data/mfeat-karhunen/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/mfeat-karhunen/mfeat-karhunen.arff
https://datahub.io/core/openml-datasets/_r/-/data/mfeat-karhunen/mfeat-karhunen.csv
https://datahub.io/core/openml-datasets/_r/-/data/mfeat-morphological/README.md
https://datahub.io/core/openml-datasets/_r/-/data/mfeat-morphological/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/mfeat-morphological/mfeat-morphological.arff
https://datahub.io/core/openml-datasets/_r/-/data/mfeat-morphological/mfeat-morphological.csv
https://datahub.io/core/openml-datasets/_r/-/data/mfeat-pixel/README.md
https://datahub.io/core/openml-datasets/_r/-/data/mfeat-pixel/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/mfeat-pixel/mfeat-pixel.arff
https://datahub.io/core/openml-datasets/_r/-/data/mfeat-pixel/mfeat-pixel.csv
https://datahub.io/core/openml-datasets/_r/-/data/mfeat-zernike/README.md
https://datahub.io/core/openml-datasets/_r/-/data/mfeat-zernike/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/mfeat-zernike/mfeat-zernike.arff
https://datahub.io/core/openml-datasets/_r/-/data/mfeat-zernike/mfeat-zernike.csv
https://datahub.io/core/openml-datasets/_r/-/data/mozilla4/README.md
https://datahub.io/core/openml-datasets/_r/-/data/mozilla4/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/mozilla4/mozilla4.arff
https://datahub.io/core/openml-datasets/_r/-/data/mozilla4/mozilla4.csv
https://datahub.io/core/openml-datasets/_r/-/data/mushroom/README.md
https://datahub.io/core/openml-datasets/_r/-/data/mushroom/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/mushroom/mushroom.arff
https://datahub.io/core/openml-datasets/_r/-/data/mushroom/mushroom.csv
https://datahub.io/core/openml-datasets/_r/-/data/musk/README.md
https://datahub.io/core/openml-datasets/_r/-/data/musk/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/musk/musk.arff
https://datahub.io/core/openml-datasets/_r/-/data/musk/musk.csv
https://datahub.io/core/openml-datasets/_r/-/data/nursery/README.md
https://datahub.io/core/openml-datasets/_r/-/data/nursery/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/nursery/nursery.arff
https://datahub.io/core/openml-datasets/_r/-/data/nursery/nursery.csv
https://datahub.io/core/openml-datasets/_r/-/data/oil_spill/README.md
https://datahub.io/core/openml-datasets/_r/-/data/oil_spill/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/oil_spill/oil_spill.arff
https://datahub.io/core/openml-datasets/_r/-/data/oil_spill/oil_spill.csv
https://datahub.io/core/openml-datasets/_r/-/data/one-hundred-plants-shape/README.md
https://datahub.io/core/openml-datasets/_r/-/data/one-hundred-plants-shape/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/one-hundred-plants-shape/one-hundred-plants-shape.arff
https://datahub.io/core/openml-datasets/_r/-/data/one-hundred-plants-shape/one-hundred-plants-shape.csv
https://datahub.io/core/openml-datasets/_r/-/data/one-hundred-plants-texture/README.md
https://datahub.io/core/openml-datasets/_r/-/data/one-hundred-plants-texture/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/one-hundred-plants-texture/one-hundred-plants-texture.arff
https://datahub.io/core/openml-datasets/_r/-/data/one-hundred-plants-texture/one-hundred-plants-texture.csv
https://datahub.io/core/openml-datasets/_r/-/data/optdigits/README.md
https://datahub.io/core/openml-datasets/_r/-/data/optdigits/datapackage.json
https://datahub.io/core/openml-datasets/_r/-/data/optdigits/optdigits.arff
https://datahub.io/core/openml-datasets/_r/-/data/optdigits/optdigits.csv
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https://datahub.io/core/openml-datasets/_r/-/data/tic-tac-toe/datapackage.json
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Key Files

Start with these files — they give you everything you need to understand and access the dataset.

https://datahub.io/core/openml-datasets/_r/-/data/Bioresponse/datapackage.json
README.mddocumentation
https://datahub.io/core/openml-datasets/_r/-/README.md
Typical Usage
  1. 1. Fetch data/Bioresponse/datapackage.json to inspect schema and resources
  2. 2. Download data resources listed in data/Bioresponse/datapackage.json
  3. 3. Read README.md for full context

Data Files

Explore with AI

letter

Unsupported data preview format `arff`

About

Last updated
9 February 2026
Format
ARFF
File size
720 kB

letter

Download

Download CSV

About

Last updated
9 February 2026
Total rows
...
Format
CSV
File size
713 kB

About this dataset

The resources for this dataset can be found at https://www.openml.org/d/6

Author: David J. Slate
Source: UCI - 01-01-1991
Please cite: P. W. Frey and D. J. Slate. "Letter Recognition Using Holland-style Adaptive Classifiers". Machine Learning 6(2), 1991

  1. TITLE: Letter Image Recognition Data

    The objective is to identify each of a large number of black-and-white rectangular pixel displays as one of the 26 capital letters in the English alphabet. The character images were based on 20 different fonts and each letter within these 20 fonts was randomly distorted to produce a file of 20,000 unique stimuli. Each stimulus was converted into 16 primitive numerical attributes (statistical moments and edge counts) which were then scaled to fit into a range of integer values from 0 through 15. We typically train on the first 16000 items and then use the resulting model to predict the letter category for the remaining 4000. See the article cited above for more details.