sklearn.datasets.load_breast_cancer

sklearn.datasets.load_breast_cancer(return_X_y=False) [source]

Load and return the breast cancer wisconsin dataset (classification).

The breast cancer dataset is a classic and very easy binary classification dataset.

Classes	2
Samples per class	212(M),357(B)
Samples total	569
Dimensionality	30
Features	real, positive

Read more in the User Guide.

Parameters:

return_X_y : boolean, default=False If True, returns (data, target) instead of a Bunch object. See below for more information about the data and target object. New in version 0.18.

Returns:

data : Bunch Dictionary-like object, the interesting attributes are: ‘data’, the data to learn, ‘target’, the classification labels, ‘target_names’, the meaning of the labels, ‘feature_names’, the meaning of the features, and ‘DESCR’, the full description of the dataset, ‘filename’, the physical location of breast cancer csv dataset (added in version 0.20). (data, target) : tuple if return_X_y is True New in version 0.18. The copy of UCI ML Breast Cancer Wisconsin (Diagnostic) dataset is downloaded from: https://goo.gl/U2Uwz2

Examples

Let’s say you are interested in the samples 10, 50, and 85, and want to know their class name.

>>> from sklearn.datasets import load_breast_cancer
>>> data = load_breast_cancer()
>>> data.target[[10, 50, 85]]
array([0, 1, 0])
>>> list(data.target_names)
['malignant', 'benign']