{ "data_id": "463", "name": "backache", "exact_name": "backache", "version": 1, "version_label": null, "description": "**Author**: \n**Source**: Unknown - Date unknown \n**Please cite**: \n\nData file:\nThis data from \"Problem-Solving\" on \"backache in pregnancy\"\nis in somewhat different\nformat from that listed in the book. Each integer is preceded by a space.\nThis makes it easier to read. Each line is split in two separated by an\nampersand. Each line also has a full stop (or period) at the end of each\nline which should be removed. If you have any queries, please contact me.\nChris Chatfield.\ncc@maths.bath.ac.uk\n\n\nInformation about the dataset\nCLASSTYPE: nominal\nCLASSINDEX: last", "format": "ARFF", "uploader": "Joaquin Vanschoren", "uploader_id": 2, "visibility": "public", "creator": "Aitchison & Dunsmore", "contributor": null, "date": "2014-09-28 23:51:14", "update_comment": "added row id feature", "last_update": "2015-04-15 17:02:58", "licence": "Public", "status": "active", "error_message": null, "url": "https:\/\/www.openml.org\/data\/download\/52575\/backache.arff", "default_target_attribute": "col_33", "row_id_attribute": "id", "ignore_attribute": null, "runs": 174, "suggest": { "input": [ "backache", "Data file: This data from \"Problem-Solving\" on \"backache in pregnancy\" is in somewhat different format from that listed in the book. Each integer is preceded by a space. This makes it easier to read. Each line is split in two separated by an ampersand. Each line also has a full stop (or period) at the end of each line which should be removed. If you have any queries, please contact me. Chris Chatfield. cc@maths.bath.ac.uk Information about the dataset CLASSTYPE: nominal CLASSINDEX: last " ], "weight": 5 }, "qualities": { "NumberOfInstances": 180, "NumberOfFeatures": 32, "NumberOfClasses": 2, "NumberOfMissingValues": 0, "NumberOfInstancesWithMissingValues": 0, "NumberOfNumericFeatures": 5, "NumberOfSymbolicFeatures": 27, "MinMutualInformation": 7.95234636e-6, "Quartile2SkewnessOfNumericAtts": 0.5746025713941322, "REPTreeDepth3Kappa": 0.028667790893760304, "DecisionStumpKappa": 0, "MaxMeansOfNumericAtts": 70.67833333333333, "MaxMutualInformation": 0.06095307703715, "MinNominalAttDistinctValues": 2, "PercentageOfBinaryFeatures": 71.875, "Quartile2StdDevOfNumericAtts": 5.559184413831713, "RandomTreeDepth1AUC": 0.41935483870967744, "Dimensionality": 0.17777777777777778, "MaxNominalAttDistinctValues": 10, "MinSkewnessOfNumericAtts": 0.17126140438393894, "PercentageOfInstancesWithMissingValues": 0, "Quartile3AttributeEntropy": 0.7726301496323416, "RandomTreeDepth1ErrRate": 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