mvpa2.datasets.miscfx.random_samples¶
-
mvpa2.datasets.miscfx.
random_samples
(dataset, npertarget, targets_attr='targets')¶ Create a dataset with a random subset of samples.
Parameters: dataset : Dataset
npertarget : int or list
If an
int
is given, the specified number of samples is randomly chosen from the group of samples sharing a unique target value. Total number of selected samples: npertarget x len(uniquetargets). If alist
is given of length matching the unique target values, it specifies the number of samples chosen for each particular unique target.targets_attr : str, optional
Returns: Dataset
A dataset instance for the chosen samples. All feature attributes and dataset attribute share there data with the source dataset.