dask_ml.metrics.mean_squared_log_error

dask_ml.metrics.mean_squared_log_error

dask_ml.metrics.mean_squared_log_error(y_true: dask_ml._typing.ArrayLike, y_pred: dask_ml._typing.ArrayLike, sample_weight: Optional[dask_ml._typing.ArrayLike] = None, multioutput: Optional[str] = 'uniform_average', compute: bool = True) dask_ml._typing.ArrayLike

Mean squared logarithmic error regression loss.

This docstring was copied from sklearn.metrics.mean_squared_log_error.

Some inconsistencies with the Dask version may exist.

Read more in the User Guide.

Parameters
y_truearray-like of shape (n_samples,) or (n_samples, n_outputs)

Ground truth (correct) target values.

y_predarray-like of shape (n_samples,) or (n_samples, n_outputs)

Estimated target values.

sample_weightarray-like of shape (n_samples,), default=None

Sample weights.

multioutput{‘raw_values’, ‘uniform_average’} or array-like of shape (n_outputs,), default=’uniform_average’

Defines aggregating of multiple output values. Array-like value defines weights used to average errors.

‘raw_values’ :

Returns a full set of errors when the input is of multioutput format.

‘uniform_average’ :

Errors of all outputs are averaged with uniform weight.

squaredbool, default=True (Not supported in Dask)

If True returns MSLE (mean squared log error) value. If False returns RMSLE (root mean squared log error) value.

Returns
lossfloat or ndarray of floats

A non-negative floating point value (the best value is 0.0), or an array of floating point values, one for each individual target.

Examples

>>> from sklearn.metrics import mean_squared_log_error  
>>> y_true = [3, 5, 2.5, 7]  
>>> y_pred = [2.5, 5, 4, 8]  
>>> mean_squared_log_error(y_true, y_pred)  
0.039...
>>> mean_squared_log_error(y_true, y_pred, squared=False)  
0.199...
>>> y_true = [[0.5, 1], [1, 2], [7, 6]]  
>>> y_pred = [[0.5, 2], [1, 2.5], [8, 8]]  
>>> mean_squared_log_error(y_true, y_pred)  
0.044...
>>> mean_squared_log_error(y_true, y_pred, multioutput='raw_values')  
array([0.00462428, 0.08377444])
>>> mean_squared_log_error(y_true, y_pred, multioutput=[0.3, 0.7])  
0.060...