make_circles (original) (raw)
sklearn.datasets.make_circles(n_samples=100, *, shuffle=True, noise=None, random_state=None, factor=0.8)[source]#
Make a large circle containing a smaller circle in 2d.
A simple toy dataset to visualize clustering and classification algorithms.
Read more in the User Guide.
Parameters:
n_samplesint or tuple of shape (2,), dtype=int, default=100
If int, it is the total number of points generated. For odd numbers, the inner circle will have one point more than the outer circle. If two-element tuple, number of points in outer circle and inner circle.
Changed in version 0.23: Added two-element tuple.
shufflebool, default=True
Whether to shuffle the samples.
noisefloat, default=None
Standard deviation of Gaussian noise added to the data.
random_stateint, RandomState instance or None, default=None
Determines random number generation for dataset shuffling and noise. Pass an int for reproducible output across multiple function calls. See Glossary.
factorfloat, default=.8
Scale factor between inner and outer circle in the range [0, 1).
Returns:
Xndarray of shape (n_samples, 2)
The generated samples.
yndarray of shape (n_samples,)
The integer labels (0 or 1) for class membership of each sample.
Examples
from sklearn.datasets import make_circles X, y = make_circles(random_state=42) X.shape (100, 2) y.shape (100,) list(y[:5]) [np.int64(1), np.int64(1), np.int64(1), np.int64(0), np.int64(0)]