U ^{j0|@sdZddlmZddlZddlmZddlmZddl m Z m Z ddl m Z dd lmZdd lmZdd lmZdd lmZdd lmZmZmZmZmZmZmZddlmZm Z m!Z!m"Z"m#Z#ddl$m%Z%ddl&m'Z'm(Z(ddl)m*Z*m+Z+dgZ,ddZ-ddZ.d/ddZ/e#eddgeddgeddggddgde e0gddgddgddge"d ddhge1ge!e ddd!d"ge"d d#d$hge"d%d&d'hgd( d)d*dddd d+d,d d%d-d.dZ2dS)0zBPartial dependence plots for regression and classification models.)IterableN)sparse) mquantiles) is_classifier is_regressor)RandomForestRegressor)BaseGradientBoosting)BaseHistGradientBoosting)NotFittedError)DecisionTreeRegressor)Bunch_determine_key_type_get_column_indices _safe_assign_safe_indexing check_arraycheck_matplotlib_support) HasMethodsIntegralInterval StrOptionsvalidate_params) cartesian)_check_sample_weightcheck_is_fitted)_check_feature_names_get_feature_indexpartial_dependencec CsBt|trt|dkrtdtdd|Ds8td|d|dkrPtd|dkr`td g}t|D]\}}ztt||dd }Wn4t k r}ztd |d |W5d }~XYnX|s|j d|kr|} nPt t||dd |dd} t | d| drtdtj | d| d|dd} || qlt||fS)a Generate a grid of points based on the percentiles of X. The grid is a cartesian product between the columns of ``values``. The ith column of ``values`` consists in ``grid_resolution`` equally-spaced points between the percentiles of the jth column of X. If ``grid_resolution`` is bigger than the number of unique values in the j-th column of X or if the feature is a categorical feature (by inspecting `is_categorical`) , then those unique values will be used instead. Parameters ---------- X : array-like of shape (n_samples, n_target_features) The data. percentiles : tuple of float The percentiles which are used to construct the extreme values of the grid. Must be in [0, 1]. is_categorical : list of bool For each feature, tells whether it is categorical or not. If a feature is categorical, then the values used will be the unique ones (i.e. categories) instead of the percentiles. grid_resolution : int The number of equally spaced points to be placed on the grid for each feature. Returns ------- grid : ndarray of shape (n_points, n_target_features) A value for each feature at each point in the grid. ``n_points`` is always ``<= grid_resolution ** X.shape[1]``. values : list of 1d ndarrays The values with which the grid has been created. The size of each array ``values[j]`` is either ``grid_resolution``, or the number of unique values in ``X[:, j]``, whichever is smaller. rz/'percentiles' must be a sequence of 2 elements.css&|]}d|kodknVqdS)rrN).0xr r e/var/www/html/bwave/python/venv/lib/python3.8/site-packages/sklearn/inspection/_partial_dependence.py Ysz_grid_from_X..z''percentiles' values must be in [0, 1].rrz9percentiles[0] must be strictly less than percentiles[1].z2'grid_resolution' must be strictly greater than 1.axisz The column #z contains mixed data types. Finding unique categories fail due to sorting. It usually means that the column contains `np.nan` values together with `str` categories. Such use case is not yet supported in scikit-learn.N)Zprobr&ztpercentiles are too close to each other, unable to build the grid. Please choose percentiles that are further apart.T)numZendpoint) isinstancerlen ValueErrorall enumeratenpuniquer TypeErrorshaperZallcloseZlinspaceappendr) X percentilesis_categoricalgrid_resolutionvaluesfeatureZis_catZuniquesexcr&Zemp_percentilesr r r# _grid_from_X/sJ(   r9cCs&|||}|jdkr"|dd}|S)a} Calculate partial dependence via the recursion method. The recursion method is in particular enabled for tree-based estimators. For each `grid` value, a weighted tree traversal is performed: if a split node involves an input feature of interest, the corresponding left or right branch is followed; otherwise both branches are followed, each branch being weighted by the fraction of training samples that entered that branch. Finally, the partial dependence is given by a weighted average of all the visited leaves values. This method is more efficient in terms of speed than the `'brute'` method (:func:`~sklearn.inspection._partial_dependence._partial_dependence_brute`). However, here, the partial dependence computation is done explicitly with the `X` used during training of `est`. Parameters ---------- est : BaseEstimator A fitted estimator object implementing :term:`predict` or :term:`decision_function`. Multioutput-multiclass classifiers are not supported. Note that `'recursion'` is only supported for some tree-based estimators (namely :class:`~sklearn.ensemble.GradientBoostingClassifier`, :class:`~sklearn.ensemble.GradientBoostingRegressor`, :class:`~sklearn.ensemble.HistGradientBoostingClassifier`, :class:`~sklearn.ensemble.HistGradientBoostingRegressor`, :class:`~sklearn.tree.DecisionTreeRegressor`, :class:`~sklearn.ensemble.RandomForestRegressor`, ). grid : array-like of shape (n_points, n_target_features) The grid of feature values for which the partial dependence is calculated. Note that `n_points` is the number of points in the grid and `n_target_features` is the number of features you are doing partial dependence at. features : array-like of {int, str} The feature (e.g. `[0]`) or pair of interacting features (e.g. `[(0, 1)]`) for which the partial dependency should be computed. Returns ------- averaged_predictions : array-like of shape (n_targets, n_points) The averaged predictions for the given `grid` of features values. Note that `n_targets` is the number of targets (e.g. 1 for binary classification, `n_tasks` for multi-output regression, and `n_classes` for multiclass classification) and `n_points` is the number of points in the `grid`. r)Z%_compute_partial_dependence_recursionndimreshape)estgridfeaturesaveraged_predictionsr r r#_partial_dependence_recursions1   rAc Csg}g}t|r|j}nnt|dd} t|dd} |dkrB| p>| }n|dkrN| n| }|dkr|dkrltdn|dkr~tdntd|} |D]} t|D]\} }t| | | |dqz,|| }|||tj |d |d Wqt k r}ztd |W5d}~XYqXq|j d }t |j }t|rR|jd krR||d }n.t|r|j d d kr|d}||d }t |j }t|r|jdkr|dd }n.t|r|j d d kr|d}|dd }||fS)a&Calculate partial dependence via the brute force method. The brute method explicitly averages the predictions of an estimator over a grid of feature values. For each `grid` value, all the samples from `X` have their variables of interest replaced by that specific `grid` value. The predictions are then made and averaged across the samples. This method is slower than the `'recursion'` (:func:`~sklearn.inspection._partial_dependence._partial_dependence_recursion`) version for estimators with this second option. However, with the `'brute'` force method, the average will be done with the given `X` and not the `X` used during training, as it is done in the `'recursion'` version. Therefore the average can always accept `sample_weight` (even when the estimator was fitted without). Parameters ---------- est : BaseEstimator A fitted estimator object implementing :term:`predict`, :term:`predict_proba`, or :term:`decision_function`. Multioutput-multiclass classifiers are not supported. grid : array-like of shape (n_points, n_target_features) The grid of feature values for which the partial dependence is calculated. Note that `n_points` is the number of points in the grid and `n_target_features` is the number of features you are doing partial dependence at. features : array-like of {int, str} The feature (e.g. `[0]`) or pair of interacting features (e.g. `[(0, 1)]`) for which the partial dependency should be computed. X : array-like of shape (n_samples, n_features) `X` is used to generate values for the complement features. That is, for each value in `grid`, the method will average the prediction of each sample from `X` having that grid value for `features`. response_method : {'auto', 'predict_proba', 'decision_function'}, default='auto' Specifies whether to use :term:`predict_proba` or :term:`decision_function` as the target response. For regressors this parameter is ignored and the response is always the output of :term:`predict`. By default, :term:`predict_proba` is tried first and we revert to :term:`decision_function` if it doesn't exist. sample_weight : array-like of shape (n_samples,), default=None Sample weights are used to calculate weighted means when averaging the model output. If `None`, then samples are equally weighted. Note that `sample_weight` does not change the individual predictions. Returns ------- averaged_predictions : array-like of shape (n_targets, n_points) The averaged predictions for the given `grid` of features values. Note that `n_targets` is the number of targets (e.g. 1 for binary classification, `n_tasks` for multi-output regression, and `n_classes` for multiclass classification) and `n_points` is the number of points in the `grid`. predictions : array-like The predictions for the given `grid` of features values over the samples from `X`. For non-multioutput regression and binary classification the shape is `(n_instances, n_points)` and for multi-output regression and multiclass classification the shape is `(n_targets, n_instances, n_points)`, where `n_targets` is the number of targets (`n_tasks` for multi-output regression, and `n_classes` for multiclass classification), `n_instances` is the number of instances in `X`, and `n_points` is the number of points in the `grid`. predict_probaNdecision_functionautozCThe estimator has no predict_proba and no decision_function method.z*The estimator has no predict_proba method.z.The estimator has no decision_function method.)Zcolumn_indexerr)r&weightsz0'estimator' parameter must be a fitted estimatorrr:r)rpredictgetattrr*copyr,rr1r-averager r0arrayTr;r<r)r=r>r?r2response_method sample_weight predictionsr@Zprediction_methodrBrCZX_eval new_valuesivariablepredeZ n_samplesr r r#_partial_dependence_brutesXH          rTfitrFrBrCz array-likez sparse matrixrDleft)closed recursionbruterI individualZboth) estimatorr2r?rMcategorical_features feature_namesrLr3r5methodkindT)Zprefer_skip_nested_validation)g?gffffff?d)rMr\r]rLr3r5r^r_csht|t|s t|s tdt|rBt|jdtjrBtdt|dsdt |sdt |dt d}t|r||dkr|td| d kr| d krtd d } | d kr|d k rtd| dkr|d k rd } n4t|t r|jd krd } nt|tttfrd } nd } | d krVt|t tttfs0d} tdd| |dkr>d}|dkrVtd||d k rjt||}t|dddkrtt|drtd|jddtjt||tjdd} t||jd} d krdgt| }ntjddj j!dkrFj"| kr2tdj"d| dfd d!| D}nFj j!d"krzfd#d!Dfd$d!| D}ntd%j d&t#t$|| dd'|||\}}| d krt%||| |||\}}|j&d(|jdfd)d!|D}n t'||| }|j&d0d*d!|D}t(}d+}|j)|d,d-|d.| d kr@||d <n$| d/krT||d/<n||d <||d/<|S)1a"Partial dependence of ``features``. Partial dependence of a feature (or a set of features) corresponds to the average response of an estimator for each possible value of the feature. Read more in the :ref:`User Guide `. .. warning:: For :class:`~sklearn.ensemble.GradientBoostingClassifier` and :class:`~sklearn.ensemble.GradientBoostingRegressor`, the `'recursion'` method (used by default) will not account for the `init` predictor of the boosting process. In practice, this will produce the same values as `'brute'` up to a constant offset in the target response, provided that `init` is a constant estimator (which is the default). However, if `init` is not a constant estimator, the partial dependence values are incorrect for `'recursion'` because the offset will be sample-dependent. It is preferable to use the `'brute'` method. Note that this only applies to :class:`~sklearn.ensemble.GradientBoostingClassifier` and :class:`~sklearn.ensemble.GradientBoostingRegressor`, not to :class:`~sklearn.ensemble.HistGradientBoostingClassifier` and :class:`~sklearn.ensemble.HistGradientBoostingRegressor`. Parameters ---------- estimator : BaseEstimator A fitted estimator object implementing :term:`predict`, :term:`predict_proba`, or :term:`decision_function`. Multioutput-multiclass classifiers are not supported. X : {array-like, sparse matrix or dataframe} of shape (n_samples, n_features) ``X`` is used to generate a grid of values for the target ``features`` (where the partial dependence will be evaluated), and also to generate values for the complement features when the `method` is 'brute'. features : array-like of {int, str, bool} or int or str The feature (e.g. `[0]`) or pair of interacting features (e.g. `[(0, 1)]`) for which the partial dependency should be computed. sample_weight : array-like of shape (n_samples,), default=None Sample weights are used to calculate weighted means when averaging the model output. If `None`, then samples are equally weighted. If `sample_weight` is not `None`, then `method` will be set to `'brute'`. Note that `sample_weight` is ignored for `kind='individual'`. .. versionadded:: 1.3 categorical_features : array-like of shape (n_features,) or shape (n_categorical_features,), dtype={bool, int, str}, default=None Indicates the categorical features. - `None`: no feature will be considered categorical; - boolean array-like: boolean mask of shape `(n_features,)` indicating which features are categorical. Thus, this array has the same shape has `X.shape[1]`; - integer or string array-like: integer indices or strings indicating categorical features. .. versionadded:: 1.2 feature_names : array-like of shape (n_features,), dtype=str, default=None Name of each feature; `feature_names[i]` holds the name of the feature with index `i`. By default, the name of the feature corresponds to their numerical index for NumPy array and their column name for pandas dataframe. .. versionadded:: 1.2 response_method : {'auto', 'predict_proba', 'decision_function'}, default='auto' Specifies whether to use :term:`predict_proba` or :term:`decision_function` as the target response. For regressors this parameter is ignored and the response is always the output of :term:`predict`. By default, :term:`predict_proba` is tried first and we revert to :term:`decision_function` if it doesn't exist. If ``method`` is 'recursion', the response is always the output of :term:`decision_function`. percentiles : tuple of float, default=(0.05, 0.95) The lower and upper percentile used to create the extreme values for the grid. Must be in [0, 1]. grid_resolution : int, default=100 The number of equally spaced points on the grid, for each target feature. method : {'auto', 'recursion', 'brute'}, default='auto' The method used to calculate the averaged predictions: - `'recursion'` is only supported for some tree-based estimators (namely :class:`~sklearn.ensemble.GradientBoostingClassifier`, :class:`~sklearn.ensemble.GradientBoostingRegressor`, :class:`~sklearn.ensemble.HistGradientBoostingClassifier`, :class:`~sklearn.ensemble.HistGradientBoostingRegressor`, :class:`~sklearn.tree.DecisionTreeRegressor`, :class:`~sklearn.ensemble.RandomForestRegressor`, ) when `kind='average'`. This is more efficient in terms of speed. With this method, the target response of a classifier is always the decision function, not the predicted probabilities. Since the `'recursion'` method implicitly computes the average of the Individual Conditional Expectation (ICE) by design, it is not compatible with ICE and thus `kind` must be `'average'`. - `'brute'` is supported for any estimator, but is more computationally intensive. - `'auto'`: the `'recursion'` is used for estimators that support it, and `'brute'` is used otherwise. If `sample_weight` is not `None`, then `'brute'` is used regardless of the estimator. Please see :ref:`this note ` for differences between the `'brute'` and `'recursion'` method. kind : {'average', 'individual', 'both'}, default='average' Whether to return the partial dependence averaged across all the samples in the dataset or one value per sample or both. See Returns below. Note that the fast `method='recursion'` option is only available for `kind='average'` and `sample_weights=None`. Computing individual dependencies and doing weighted averages requires using the slower `method='brute'`. .. versionadded:: 0.24 Returns ------- predictions : :class:`~sklearn.utils.Bunch` Dictionary-like object, with the following attributes. individual : ndarray of shape (n_outputs, n_instances, len(values[0]), len(values[1]), ...) The predictions for all the points in the grid for all samples in X. This is also known as Individual Conditional Expectation (ICE). Only available when `kind='individual'` or `kind='both'`. average : ndarray of shape (n_outputs, len(values[0]), len(values[1]), ...) The predictions for all the points in the grid, averaged over all samples in X (or over the training data if `method` is 'recursion'). Only available when `kind='average'` or `kind='both'`. values : seq of 1d ndarrays The values with which the grid has been created. .. deprecated:: 1.3 The key `values` has been deprecated in 1.3 and will be removed in 1.5 in favor of `grid_values`. See `grid_values` for details about the `values` attribute. grid_values : seq of 1d ndarrays The values with which the grid has been created. The generated grid is a cartesian product of the arrays in `grid_values` where `len(grid_values) == len(features)`. The size of each array `grid_values[j]` is either `grid_resolution`, or the number of unique values in `X[:, j]`, whichever is smaller. .. versionadded:: 1.3 `n_outputs` corresponds to the number of classes in a multi-class setting, or to the number of tasks for multi-output regression. For classical regression and binary classification `n_outputs==1`. `n_values_feature_j` corresponds to the size `grid_values[j]`. See Also -------- PartialDependenceDisplay.from_estimator : Plot Partial Dependence. PartialDependenceDisplay : Partial Dependence visualization. Examples -------- >>> X = [[0, 0, 2], [1, 0, 0]] >>> y = [0, 1] >>> from sklearn.ensemble import GradientBoostingClassifier >>> gb = GradientBoostingClassifier(random_state=0).fit(X, y) >>> partial_dependence(gb, features=[0], X=X, percentiles=(0, 1), ... grid_resolution=2) # doctest: +SKIP (array([[-4.52..., 4.52...]]), [array([ 0., 1.])]) z5'estimator' must be a fitted regressor or classifier.rz3Multiclass-multioutput estimators are not supportedZ __array__z allow-nan)Zforce_all_finitedtyperDzKThe response_method parameter is ignored for regressors and must be 'auto'.rIrXzCThe 'recursion' method only applies when 'kind' is set to 'average'rYNzFThe 'recursion' method can only be applied when sample_weight is None.)ZGradientBoostingClassifierZGradientBoostingRegressorZHistGradientBoostingClassifierHistGradientBoostingRegressorrbr rz[Only the following estimators support the 'recursion' method: {}. Try using method='brute'.z, rCzUWith the 'recursion' method, the response_method must be 'decision_function'. Got {}.F)Z accept_sliceintzall features must be in [0, {}]rC)raorder)rHbzeWhen `categorical_features` is a boolean array-like, the array should be of shape (n_features,). Got z elements while `X` contains z features.csg|] }|qSr r r!idx)r\r r# sz&partial_dependence..)rPOUcsg|]}t|dqS)r])r)r!catrlr r#riscsg|] }|kqSr r rg)categorical_features_idxr r#riszXExpected `categorical_features` to be an array-like of boolean, integer, or string. Got z instead.r%r:cSsg|]}|jdqSrr0r!valr r r#riscSsg|]}|jdqSrorprqr r r#riszaKey: 'values', is deprecated in 1.3 and will be removed in 1.5. Please use 'grid_values' instead.Z grid_valuesr6)Znew_keyZdeprecated_keyZwarning_messagerZ)r:)*rrrr*r(Zclasses_r-Zndarrayhasattrrissparserobjectr initr r rformatjoinrranylessr0ZasarrayrZint32Zravelrr)rJrar_sizer9rrTr<rAr Z_set_deprecated)r[r2r?rMr\r]rLr3r5r^r_Zsupported_classes_recursionZfeatures_indicesZ n_featuresr4r>r6r@rNZ pdp_resultsmsgr )r\rnr]r#ras ^                       )N)3__doc__collections.abcrnumpyr-ZscipyrZscipy.stats.mstatsrbaserrZensemblerZ ensemble._gbr Z2ensemble._hist_gradient_boosting.gradient_boostingr exceptionsr treer utilsr rrrrrrZutils._param_validationrrrrrZ utils.extmathrZutils.validationrrZ _pd_utilsrr__all__r9rArTstrtuplerr r r r#sb        $  \;