dask_ml.datasets.make_regression
dask_ml.datasets.make_regression¶
- dask_ml.datasets.make_regression(n_samples=100, n_features=100, n_informative=10, n_targets=1, bias=0.0, effective_rank=None, tail_strength=0.5, noise=0.0, shuffle=True, coef=False, random_state=None, chunks=None)¶
Generate a random regression problem.
The input set can either be well conditioned (by default) or have a low rank-fat tail singular profile. See
sklearn.datasets.make_low_rank_matrix()for more details.This can be used to generate very large Dask arrays on a cluster of machines. When using Dask in distributed mode, the client machine only needs to allocate a single block’s worth of data.
- Parameters
- n_samplesint, optional (default=100)
The number of samples.
- n_featuresint, optional (default=100)
The number of features.
- n_informativeint, optional (default=10)
The number of informative features, i.e., the number of features used to build the linear model used to generate the output.
- n_targetsint, optional (default=1)
The number of regression targets, i.e., the dimension of the y output vector associated with a sample. By default, the output is a scalar.
- biasfloat, optional (default=0.0)
The bias term in the underlying linear model.
- effective_rankint or None, optional (default=None)
- if not None:
The approximate number of singular vectors required to explain most of the input data by linear combinations. Using this kind of singular spectrum in the input allows the generator to reproduce the correlations often observed in practice.
- if None:
The input set is well conditioned, centered and gaussian with unit variance.
- tail_strengthfloat between 0.0 and 1.0, optional (default=0.5)
The relative importance of the fat noisy tail of the singular values profile if effective_rank is not None.
- noisefloat, optional (default=0.0)
The standard deviation of the gaussian noise applied to the output.
- shuffleboolean, optional (default=True)
Shuffle the samples and the features.
- coefboolean, optional (default=False)
If True, the coefficients of the underlying linear model are returned.
- random_stateint, RandomState instance or None (default)
Determines random number generation for dataset creation. Pass an int for reproducible output across multiple function calls. See Glossary.
- chunksint, tuple
How to chunk the array. Must be one of the following forms: - A blocksize like 1000. - A blockshape like (1000, 1000). - Explicit sizes of all blocks along all dimensions like
((1000, 1000, 500), (400, 400)).
- Returns
- XDask array of shape [n_samples, n_features]
The input samples.
- yDask array of shape [n_samples] or [n_samples, n_targets]
The output values.
- coefarray of shape [n_features] or [n_features, n_targets], optional
The coefficient of the underlying linear model. It is returned only if coef is True.