sklearn.metrics.cluster.contingency_matrix

sklearn.metrics.cluster.contingency_matrix(labels_true, labels_pred, *, eps=None, sparse=False)[source]

Build a contingency matrix describing the relationship between labels.

Parameters
labels_trueint array, shape = [n_samples]

Ground truth class labels to be used as a reference

labels_predarray-like of shape (n_samples,)

Cluster labels to evaluate

epsfloat, default=None

If a float, that value is added to all values in the contingency matrix. This helps to stop NaN propagation. If None, nothing is adjusted.

sparsebool, default=False

If True, return a sparse CSR continency matrix. If eps is not None, and sparse is True, will throw ValueError.

New in version 0.18.

Returns
contingency{array-like, sparse}, shape=[n_classes_true, n_classes_pred]

Matrix \(C\) such that \(C_{i, j}\) is the number of samples in true class \(i\) and in predicted class \(j\). If eps is None, the dtype of this array will be integer. If eps is given, the dtype will be float. Will be a scipy.sparse.csr_matrix if sparse=True.