# sklearn.datasets.fetch_mldata¶

Warning

DEPRECATED

sklearn.datasets.fetch_mldata(dataname, target_name=’label’, data_name=’data’, transpose_data=True, data_home=None)[source]

DEPRECATED: fetch_mldata was deprecated in version 0.20 and will be removed in version 0.22. Please use fetch_openml.

Fetch an mldata.org data set

mldata.org is no longer operational.

If the file does not exist yet, it is downloaded from mldata.org .

mldata.org does not have an enforced convention for storing data or naming the columns in a data set. The default behavior of this function works well with the most common cases:

1. data values are stored in the column ‘data’, and target values in the column ‘label’
2. alternatively, the first column stores target values, and the second data values
3. the data array is stored as n_features x n_samples , and thus needs to be transposed to match the sklearn standard

Keyword arguments allow to adapt these defaults to specific data sets (see parameters target_name, data_name, transpose_data, and the examples below).

mldata.org data sets may have multiple columns, which are stored in the Bunch object with their original name.

Deprecated since version 0.20: Will be removed in version 0.22

Parameters: dataname : str Name of the data set on mldata.org, e.g.: “leukemia”, “Whistler Daily Snowfall”, etc. The raw name is automatically converted to a mldata.org URL . target_name : optional, default: ‘label’ Name or index of the column containing the target values. data_name : optional, default: ‘data’ Name or index of the column containing the data. transpose_data : optional, default: True If True, transpose the downloaded data array. data_home : optional, default: None Specify another download and cache folder for the data sets. By default all scikit-learn data is stored in ‘~/scikit_learn_data’ subfolders. data : Bunch Dictionary-like object, the interesting attributes are: ‘data’, the data to learn, ‘target’, the classification labels, ‘DESCR’, the full description of the dataset, and ‘COL_NAMES’, the original names of the dataset columns.