np.floor instead of np.ceil

[psl-schaefer]

py_pcha/py_pcha/PCHA.py

Line 153 in f398d28

i = furthest_sum(X[:, I], noc, [int(np.ceil(len(I) * np.random.rand()))])

Why are you using np.ceil here? Because it is possible to select and $i$ that is not in the data leading to an index error.