iates
k (int): The number of classes
num_samples (int): The number of samples
radius (float): The radius of the ball to sample the class center
seed (int): Random seed.
visualize (bool): Whether to visualize the data
save_dir (str): The save path of the visualization figure, if set None, we just visualize instead of storing it.</p>
</dd>
<dt>Returns:</dt><dd><dl class="simple">
<dt>tuple: (covariate, target) where:</dt><dd><ul class="simple">
<li><p>X (numpy.ndarray): A numpy array containing the generated 