如何解决如何在2D数组中正确分配值?
我正在尝试为图中的节点的每个子集分配一个热编码。 下面是我正在尝试的代码
import networkx as nx
import numpy as np
graph=nx.karate_club_graph()
nodes=list(graph.nodes())
n=graph.number_of_nodes()
subset_nodes=[1,2]
for v in subset_nodes:
y=nodes.index(v)
prob_vec=np.zeros((n,n))
prob_vec[0][y]=1
print(prob_vec)
我得到这个结果
[0. 1. 0. ... 0. 0. 0.]
[0. 0. 0. ... 0. 0. 0.]
[0. 0. 0. ... 0. 0. 0.]
...
[0. 0. 0. ... 0. 0. 0.]
[0. 0. 0. ... 0. 0. 0.]
[0. 0. 0. ... 0. 0. 0.]]
[[0. 0. 1. ... 0. 0. 0.]
[0. 0. 0. ... 0. 0. 0.]
[0. 0. 0. ... 0. 0. 0.]
...
[0. 0. 0. ... 0. 0. 0.]
[0. 0. 0. ... 0. 0. 0.]
[0. 0. 0. ... 0. 0. 0.]]
I expect a matrix,with the subset nodes rows contains one hot encoding(1 value for each node in the subset node and others being zeros) like below:
[0. 1. 0. ... 0. 0. 0.]
[0.0 . 1. ... 0. 0. 0.]
[0. 0. 0. ... 0. 0. 0.]
...
[0. 0. 0. ... 0. 0. 0.]
[0. 0. 0. ... 0. 0. 0.]
[0. 0. 0. ... 0. 0. 0.]]
任何帮助将不胜感激
解决方法
如果我了解您要执行的操作,我认为您需要稍微调整一下代码。您当前正在打印每个循环,并将每个循环的prob_vec重置为0。我认为您想做更多这样的事情:
import networkx as nx
import numpy as np
graph=nx.karate_club_graph()
nodes=list(graph.nodes())
n=graph.number_of_nodes()
subset_nodes=[1,2]
prob_vec=np.zeros((n,n))
for v in range(n):
y = nodes.index(v)
if y in subset_nodes:
prob_vec[v][y]=1
print(prob_vec)
这将输出:
[[0. 0. 0. ... 0. 0. 0.]
[0. 1. 0. ... 0. 0. 0.]
[0. 0. 1. ... 0. 0. 0.]
...
[0. 0. 0. ... 0. 0. 0.]
[0. 0. 0. ... 0. 0. 0.]
[0. 0. 0. ... 0. 0. 0.]]
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