raw_random.py 文件源码

def normal(random_state, size=None, avg=0.0, std=1.0, ndim=None, dtype=None):
    """
    Sample from a normal distribution centered on avg with
    the specified standard deviation (std).

    If the size argument is ambiguous on the number of dimensions, ndim
    may be a plain integer to supplement the missing information.

    If size is None, the output shape will be determined by the shapes
    of avg and std.

    If dtype is not specified, it will be inferred from the dtype of
    avg and std, but will be at least as precise as floatX.

    """
    avg = tensor.as_tensor_variable(avg)
    std = tensor.as_tensor_variable(std)
    if dtype is None:
        dtype = tensor.scal.upcast(theano.config.floatX, avg.dtype, std.dtype)
    ndim, size, bcast = _infer_ndim_bcast(ndim, size, avg, std)
    op = RandomFunction('normal',
                        tensor.TensorType(dtype=dtype, broadcastable=bcast))
    return op(random_state, size, avg, std)