diff options
Diffstat (limited to 'numpy')
| -rw-r--r-- | numpy/random/mtrand/mtrand.pyx | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/numpy/random/mtrand/mtrand.pyx b/numpy/random/mtrand/mtrand.pyx index d6ba58bb2..e12c7669d 100644 --- a/numpy/random/mtrand/mtrand.pyx +++ b/numpy/random/mtrand/mtrand.pyx @@ -4459,10 +4459,24 @@ cdef class RandomState: For the first run, we threw 3 times 1, 4 times 2, etc. For the second, we threw 2 times 1, 4 times 2, etc. - A loaded dice is more likely to land on number 6: + A loaded die is more likely to land on number 6: - >>> np.random.multinomial(100, [1/7.]*5) - array([13, 16, 13, 16, 42]) + >>> np.random.multinomial(100, [1/7.]*5 + [2/7.]) + array([11, 16, 14, 17, 16, 26]) + + The probability inputs should be normalized. As an implementation + detail, the value of the last entry is ignored and assumed to take + up any leftover probability mass, but this should not be relied on. + A biased coin which has twice as much weight on one side as on the + other should be sampled like so: + + >>> np.random.multinomial(100, [1.0 / 3, 2.0 / 3]) # RIGHT + array([38, 62]) + + not like: + + >>> np.random.multinomial(100, [1.0, 2.0]) # WRONG + array([100, 0]) """ cdef npy_intp d |