sklearn.inspection
.PartialDependenceDisplay¶
- class sklearn.inspection.PartialDependenceDisplay(pd_results, *, features, feature_names, target_idx, pdp_lim, deciles, kind='average', subsample=1000, random_state=None)[source]¶
Partial Dependence Plot (PDP).
This can also display individual partial dependencies which are often referred to as: Individual Condition Expectation (ICE).
It is recommended to use
from_estimator
to create aPartialDependenceDisplay
. All parameters are stored as attributes.Read more in Advanced Plotting With Partial Dependence and the User Guide.
New in version 0.22.
- Parameters
- pd_resultslist of Bunch
Results of
partial_dependence
forfeatures
.- featureslist of (int,) or list of (int, int)
Indices of features for a given plot. A tuple of one integer will plot a partial dependence curve of one feature. A tuple of two integers will plot a two-way partial dependence curve as a contour plot.
- feature_nameslist of str
Feature names corresponding to the indices in
features
.- target_idxint
In a multiclass setting, specifies the class for which the PDPs should be computed. Note that for binary classification, the positive class (index 1) is always used.
In a multioutput setting, specifies the task for which the PDPs should be computed.
Ignored in binary classification or classical regression settings.
- pdp_limdict
Global min and max average predictions, such that all plots will have the same scale and y limits.
pdp_lim[1]
is the global min and max for single partial dependence curves.pdp_lim[2]
is the global min and max for two-way partial dependence curves.- decilesdict
Deciles for feature indices in
features
.- kind{‘average’, ‘individual’, ‘both’}, default=’average’
Whether to plot the partial dependence averaged across all the samples in the dataset or one line per sample or both.
kind='average'
results in the traditional PD plot;kind='individual'
results in the ICE plot.
Note that the fast
method='recursion'
option is only available forkind='average'
. Plotting individual dependencies requires using the slowermethod='brute'
option.New in version 0.24.
- subsamplefloat, int or None, default=1000
Sampling for ICE curves when
kind
is ‘individual’ or ‘both’. If float, should be between 0.0 and 1.0 and represent the proportion of the dataset to be used to plot ICE curves. If int, represents the maximum absolute number of samples to use.Note that the full dataset is still used to calculate partial dependence when
kind='both'
.New in version 0.24.
- random_stateint, RandomState instance or None, default=None
Controls the randomness of the selected samples when subsamples is not
None
. See Glossary for details.New in version 0.24.
- Attributes
- bounding_ax_matplotlib Axes or None
If
ax
is an axes or None, thebounding_ax_
is the axes where the grid of partial dependence plots are drawn. Ifax
is a list of axes or a numpy array of axes,bounding_ax_
is None.- axes_ndarray of matplotlib Axes
If
ax
is an axes or None,axes_[i, j]
is the axes on the i-th row and j-th column. Ifax
is a list of axes,axes_[i]
is the i-th item inax
. Elements that are None correspond to a nonexisting axes in that position.- lines_ndarray of matplotlib Artists
If
ax
is an axes or None,lines_[i, j]
is the partial dependence curve on the i-th row and j-th column. Ifax
is a list of axes,lines_[i]
is the partial dependence curve corresponding to the i-th item inax
. Elements that are None correspond to a nonexisting axes or an axes that does not include a line plot.- deciles_vlines_ndarray of matplotlib LineCollection
If
ax
is an axes or None,vlines_[i, j]
is the line collection representing the x axis deciles of the i-th row and j-th column. Ifax
is a list of axes,vlines_[i]
corresponds to the i-th item inax
. Elements that are None correspond to a nonexisting axes or an axes that does not include a PDP plot.New in version 0.23.
- deciles_hlines_ndarray of matplotlib LineCollection
If
ax
is an axes or None,vlines_[i, j]
is the line collection representing the y axis deciles of the i-th row and j-th column. Ifax
is a list of axes,vlines_[i]
corresponds to the i-th item inax
. Elements that are None correspond to a nonexisting axes or an axes that does not include a 2-way plot.New in version 0.23.
- contours_ndarray of matplotlib Artists
If
ax
is an axes or None,contours_[i, j]
is the partial dependence plot on the i-th row and j-th column. Ifax
is a list of axes,contours_[i]
is the partial dependence plot corresponding to the i-th item inax
. Elements that are None correspond to a nonexisting axes or an axes that does not include a contour plot.- figure_matplotlib Figure
Figure containing partial dependence plots.
See also
partial_dependence
Compute Partial Dependence values.
PartialDependenceDisplay.from_estimator
Plot Partial Dependence.
Methods
from_estimator
(estimator, X, features, *[, …])Partial dependence (PD) and individual conditional expectation (ICE) plots.
plot
(*[, ax, n_cols, line_kw, ice_lines_kw, …])Plot partial dependence plots.
- classmethod from_estimator(estimator, X, features, *, feature_names=None, target=None, response_method='auto', n_cols=3, grid_resolution=100, percentiles=(0.05, 0.95), method='auto', n_jobs=None, verbose=0, line_kw=None, ice_lines_kw=None, pd_line_kw=None, contour_kw=None, ax=None, kind='average', subsample=1000, random_state=None)[source]¶
Partial dependence (PD) and individual conditional expectation (ICE) plots.
Partial dependence plots, individual conditional expectation plots or an overlay of both of them can be plotted by setting the
kind
parameter. Thelen(features)
plots are arranged in a grid withn_cols
columns. Two-way partial dependence plots are plotted as contour plots. The deciles of the feature values will be shown with tick marks on the x-axes for one-way plots, and on both axes for two-way plots.Read more in the User Guide.
Note
PartialDependenceDisplay.from_estimator
does not support using the same axes with multiple calls. To plot the the partial dependence for multiple estimators, please pass the axes created by the first call to the second call:>>> from sklearn.inspection import PartialDependenceDisplay >>> from sklearn.datasets import make_friedman1 >>> from sklearn.linear_model import LinearRegression >>> from sklearn.ensemble import RandomForestRegressor >>> X, y = make_friedman1() >>> est1 = LinearRegression().fit(X, y) >>> est2 = RandomForestRegressor().fit(X, y) >>> disp1 = PartialDependenceDisplay.from_estimator(est1, X, ... [1, 2]) >>> disp2 = PartialDependenceDisplay.from_estimator(est2, X, [1, 2], ... ax=disp1.axes_)
Warning
For
GradientBoostingClassifier
andGradientBoostingRegressor
, the'recursion'
method (used by default) will not account for theinit
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 thatinit
is a constant estimator (which is the default). However, ifinit
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 toGradientBoostingClassifier
andGradientBoostingRegressor
, not toHistGradientBoostingClassifier
andHistGradientBoostingRegressor
.New in version 1.0.
- Parameters
- estimatorBaseEstimator
A fitted estimator object implementing predict, predict_proba, or decision_function. Multioutput-multiclass classifiers are not supported.
- X{array-like, dataframe} of shape (n_samples, n_features)
X
is used to generate a grid of values for the targetfeatures
(where the partial dependence will be evaluated), and also to generate values for the complement features when themethod
is'brute'
.- featureslist of {int, str, pair of int, pair of str}
The target features for which to create the PDPs. If
features[i]
is an integer or a string, a one-way PDP is created; iffeatures[i]
is a tuple, a two-way PDP is created (only supported withkind='average'
). Each tuple must be of size 2. if any entry is a string, then it must be infeature_names
.- feature_namesarray-like of shape (n_features,), dtype=str, default=None
Name of each feature;
feature_names[i]
holds the name of the feature with indexi
. By default, the name of the feature corresponds to their numerical index for NumPy array and their column name for pandas dataframe.- targetint, default=None
In a multiclass setting, specifies the class for which the PDPs should be computed. Note that for binary classification, the positive class (index 1) is always used.
In a multioutput setting, specifies the task for which the PDPs should be computed.
Ignored in binary classification or classical regression settings.
- response_method{‘auto’, ‘predict_proba’, ‘decision_function’}, default=’auto’
Specifies whether to use predict_proba or decision_function as the target response. For regressors this parameter is ignored and the response is always the output of predict. By default, predict_proba is tried first and we revert to decision_function if it doesn’t exist. If
method
is'recursion'
, the response is always the output of decision_function.- n_colsint, default=3
The maximum number of columns in the grid plot. Only active when
ax
is a single axis orNone
.- grid_resolutionint, default=100
The number of equally spaced points on the axes of the plots, for each target feature.
- percentilestuple of float, default=(0.05, 0.95)
The lower and upper percentile used to create the extreme values for the PDP axes. Must be in [0, 1].
- methodstr, default=’auto’
The method used to calculate the averaged predictions:
'recursion'
is only supported for some tree-based estimators (namelyGradientBoostingClassifier
,GradientBoostingRegressor
,HistGradientBoostingClassifier
,HistGradientBoostingRegressor
,DecisionTreeRegressor
,RandomForestRegressor
but 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 ICEs by design, it is not compatible with ICE and thuskind
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.
Please see this note for differences between the
'brute'
and'recursion'
method.- n_jobsint, default=None
The number of CPUs to use to compute the partial dependences. Computation is parallelized over features specified by the
features
parameter.None
means 1 unless in ajoblib.parallel_backend
context.-1
means using all processors. See Glossary for more details.- verboseint, default=0
Verbose output during PD computations.
- line_kwdict, default=None
Dict with keywords passed to the
matplotlib.pyplot.plot
call. For one-way partial dependence plots. It can be used to define common properties for bothice_lines_kw
andpdp_line_kw
.- ice_lines_kwdict, default=None
Dictionary with keywords passed to the
matplotlib.pyplot.plot
call. For ICE lines in the one-way partial dependence plots. The key value pairs defined inice_lines_kw
takes priority overline_kw
.- pd_line_kwdict, default=None
Dictionary with keywords passed to the
matplotlib.pyplot.plot
call. For partial dependence in one-way partial dependence plots. The key value pairs defined inpd_line_kw
takes priority overline_kw
.- contour_kwdict, default=None
Dict with keywords passed to the
matplotlib.pyplot.contourf
call. For two-way partial dependence plots.- axMatplotlib axes or array-like of Matplotlib axes, default=None
If a single axis is passed in, it is treated as a bounding axes and a grid of partial dependence plots will be drawn within these bounds. The
n_cols
parameter controls the number of columns in the grid.If an array-like of axes are passed in, the partial dependence plots will be drawn directly into these axes.
If
None
, a figure and a bounding axes is created and treated as the single axes case.
- kind{‘average’, ‘individual’, ‘both’}, default=’average’
Whether to plot the partial dependence averaged across all the samples in the dataset or one line per sample or both.
kind='average'
results in the traditional PD plot;kind='individual'
results in the ICE plot.
Note that the fast
method='recursion'
option is only available forkind='average'
. Plotting individual dependencies requires using the slowermethod='brute'
option.- subsamplefloat, int or None, default=1000
Sampling for ICE curves when
kind
is ‘individual’ or ‘both’. Iffloat
, should be between 0.0 and 1.0 and represent the proportion of the dataset to be used to plot ICE curves. Ifint
, represents the absolute number samples to use.Note that the full dataset is still used to calculate averaged partial dependence when
kind='both'
.- random_stateint, RandomState instance or None, default=None
Controls the randomness of the selected samples when subsamples is not
None
andkind
is either'both'
or'individual'
. See Glossary for details.
- Returns
- display
PartialDependenceDisplay
- display
See also
partial_dependence
Compute Partial Dependence values.
Examples
>>> import matplotlib.pyplot as plt >>> from sklearn.datasets import make_friedman1 >>> from sklearn.ensemble import GradientBoostingRegressor >>> from sklearn.inspection import PartialDependenceDisplay >>> X, y = make_friedman1() >>> clf = GradientBoostingRegressor(n_estimators=10).fit(X, y) >>> PartialDependenceDisplay.from_estimator(clf, X, [0, (0, 1)]) <...> >>> plt.show()
- plot(*, ax=None, n_cols=3, line_kw=None, ice_lines_kw=None, pd_line_kw=None, contour_kw=None)[source]¶
Plot partial dependence plots.
- Parameters
- axMatplotlib axes or array-like of Matplotlib axes, default=None
- If a single axis is passed in, it is treated as a bounding axes
and a grid of partial dependence plots will be drawn within these bounds. The
n_cols
parameter controls the number of columns in the grid.
- If an array-like of axes are passed in, the partial dependence
plots will be drawn directly into these axes.
- If
None
, a figure and a bounding axes is created and treated as the single axes case.
- If
- n_colsint, default=3
The maximum number of columns in the grid plot. Only active when
ax
is a single axes orNone
.- line_kwdict, default=None
Dict with keywords passed to the
matplotlib.pyplot.plot
call. For one-way partial dependence plots.- ice_lines_kwdict, default=None
Dictionary with keywords passed to the
matplotlib.pyplot.plot
call. For ICE lines in the one-way partial dependence plots. The key value pairs defined inice_lines_kw
takes priority overline_kw
.New in version 1.0.
- pd_line_kwdict, default=None
Dictionary with keywords passed to the
matplotlib.pyplot.plot
call. For partial dependence in one-way partial dependence plots. The key value pairs defined inpd_line_kw
takes priority overline_kw
.New in version 1.0.
- contour_kwdict, default=None
Dict with keywords passed to the
matplotlib.pyplot.contourf
call for two-way partial dependence plots.
- Returns
- display
PartialDependenceDisplay
- display