TST Enables isotonic and manifold in test_check_n_features_in_after_fitting #19539
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Reference Issues/PRs
Related to #19333
What does this implement/fix? Explain your changes.
IsotonicRegression accepts 1d and 2d arrays with one feature. We do not have a
n_features_in_
defined for this situation.manifold
estimators only hasfit
andfit_transform
functions, so it would passtest_check_n_features_in_after_fitting
by default.