numpy.random.sample

numpy.random.sample(size=None)

Возвращает случайные числа с плавающей точкой в полуоткрытом интервале [0.0, 1.0).

Результаты взяты из «равномерного непрерывного» распределения на указанном интервале. Для выборки

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умножить результат random_sample на (b-a) и добавить a:

(b - a) * random_sample() + a

Параметры:	size : int or tuple of ints, optional Форма выходных данных. Если заданная форма, например, (m, n, k), то m * n * k выборок генерируется. По умолчанию None, в этом случае возвращается одно значение.
Возвращаемое значение:	out : float or ndarray of floats Массив случайных чисел с формой size (если size=None, то возвращается одно число с плавающей точкой).

Примеры

>>> np.random.random_sample()
0.47108547995356098
>>> type(np.random.random_sample())
<type 'float'>
>>> np.random.random_sample((5,))
array([ 0.30220482,  0.86820401,  0.1654503 ,  0.11659149,  0.54323428])

Массив трех строк по два случайных числа из интервала [-5, 0):

>>> 5 * np.random.random_sample((3, 2)) - 5
array([[-3.99149989, -0.52338984],
       [-2.99091858, -0.79479508],
       [-1.23204345, -1.75224494]])