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Additional to the preprocessing done there (see LibSVM site for details), this dataset was created as follows: \n-join test, train and rest datasets \n-normalize each file columnwise according to the following rules: \n-If a column only contains one value (constant feature), it will set to zero and thus removed by sparsity. \n-If a column contains two values (binary feature), the value occuring more often will be set to zero, the other to one. \n-If a column contains more than two values (multinary\/real feature), the column is divided by its std deviation. \n\nNOTE: please keep in mind that cod-rna has many duplicated data points, within each file (train,test,rest) and also accross these files. these duplicated points have not been removed!", "format": "Sparse_ARFF", "uploader": "aydin demircioglu", "uploader_id": 167, "visibility": "public", "creator": "Andrew V Uzilov,Joshua M Keegan,David H Mathews.", "contributor": null, "date": "2014-08-29 18:49:36", "update_comment": null, "last_update": "2014-08-29 18:49:36", "licence": "Public", "status": "active", "error_message": null, "url": "https:\/\/www.openml.org\/data\/download\/52254\/php89ntbG", "default_target_attribute": "Y", "row_id_attribute": null, "ignore_attribute": null, "runs": 31, "suggest": { "input": [ "codrna", "Andrew V Uzilov, Joshua M Keegan, and David H Mathews. 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