执行python代码应导致获得0.97381776799999997 我正在使用Geany，并继续收到程序退出的消息，代码为0。我在做什么错？我以为代码的最后两行就是这个问题。
import numpy as np
transition_matrix = np.array([[0.33, 0.33, 0, 0, 0, 0.33, 0, 0, 0, 0, 0, 0, 0],
[0.33, 0.33, 0.33, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
[ 0, 0.25, 0.25, 0.25, 0, 0, 0.25, 0, 0, 0, 0, 0, 0],
[ 0, 0, 0.33, 0.33, 0.33, 0, 0, 0, 0, 0, 0, 0, 0],
[ 0, 0, 0, 0.33, 0.33, 0, 0, 0.33, 0, 0, 0, 0, 0],
[0.33, 0, 0, 0, 0, 0.33, 0, 0, 0.33, 0, 0, 0, 0],
[ 0, 0, 0.33, 0, 0, 0, 0.33, 0, 0, 0, 0.33, 0, 0],
[ 0, 0, 0, 0, 0.33, 0, 0, 0.33, 0, 0, 0, 0, 0.33],
[ 0, 0, 0, 0, 0, 0.33, 0, 0, 0.33, 0.33, 0, 0, 0],
[ 0, 0, 0, 0, 0, 0, 0, 0, 0.33, 0.33, 0.33, 0, 0],
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0.33, 0.33, 0.33, 0],
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0.33, 0.33, 0.33],
[ 0, 0, 0, 0, 0, 0, 0, 0.33, 0, 0, 0, 0.33, 0.33]])
emission = np.array([1.0, 0.0, 0.0, 0.0, 0.0, 1.0, 1.0, 1.0, 1.0, 0.0, 0.0, 0.0, 0.0])
init_prob = np.array([0.077, 0.077, 0.077, 0.077, 0.077, 0.077, 0.077,
0.077, 0.077, 0.077, 0.077, 0.077, 0.077])
def forward(obs, transition, emission, init):
"""
Runs forward algorithm on the HMM.
Parameters
----------
obs: 1D list, array-like
The list of observed states.
transition: 2D array-like
The transition probability of the HMM.
size = {n_states x n_states}
emission: 1D array-like
The emission probabiltiy of the HMM.
size = {n_states}
init: 1D array-like
The initial probability of HMM.
size = {n_states}
Returns
-------
float: Probability value for the obs to occur.
"""
n_states = transition.shape[0]
fwd = [{}]
for i in range(n_states):
fwd[0][y] = init[i] * emission[obs[0]]
for t in range(1, len(obs)):
fwd.append({})
for i in range(n_states):
fwd[t][i] = sum((fwd[t-1][y0] * transition[y0][i] * emission[obs[t]]) for y0 in
range(n_states))
prob = sum((fwd[len(obs) - 1][s]) for s in range(n_states))
return prob
obs = [0, 0, 0, 0] # Staying in the same location
forward(obs, transition_matrix, emission, init_prob)
在我的情况下，预期结果得到一个数字0.97381776799999997
实际结果只是该程序以代码0退出的消息