A state is a conjunction of ground, functionless atoms. E.g. [air cargo] At(P, AKL) is a state. At(Plane1, AKL) ∧ At(Plane2, WLG) is a state. At(x, y) is not a state. ¬At(Plane1, WLG) is not a state. At(Pilot(Plane1), AKL) is not a state.是什么意思
时间: 2024-03-04 12:52:22 浏览: 11
这段话在讲述人工智能中关于“状态”的概念。其中,“状态”指的是一个由多个、没有函数的原子命题构成的结合体,例如 [air cargo] At(P, AKL) 就是一个状态,表示货物在AKL机场。但是单独的原子命题如 At(x, y) 就不是一个状态,因为它需要具体的参数才能构成一个完整的命题。同样,带有函数的原子命题如 At(Pilot(Plane1), AKL) 也不是一个状态,因为这个命题中包含了函数,不能直接用来描述一个状态。
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graphviz.sources.Source at 0x1b7181719a0
`graphviz.sources.Source` is a class from the Graphviz Python library used to represent and generate source code for Graphviz graphs. It is typically used in conjunction with the `graphviz.Digraph` class to create and render graphs in various formats.
Here is an example of using `graphviz.Digraph` and `graphviz.sources.Source` to create and render a simple directed graph:
```python
from graphviz import Digraph, Source
# create a new directed graph
dot = Digraph()
# add some nodes and edges
dot.node('A')
dot.node('B')
dot.node('C')
dot.edge('A', 'B')
dot.edge('B', 'C')
# render the graph as a PNG image
dot.format = 'png'
dot.render('example')
# generate the source code for the graph
src = Source(dot.source)
# print the source code
print(src)
```
The output of the above code would be the source code for the graph in a Graphviz DOT file format. It can be used to render the graph in other formats, such as PDF or SVG, by using the `dot.render` method with the appropriate file extension.
error in evaluating the argument 'x' in selecting a method for function 'as.matrix'
As an AI language model, I cannot determine the exact cause of the error without seeing the code that produced it. However, this error message typically occurs when there is an issue with the input argument 'x' when using the 'as.matrix' function.
Possible reasons for this error include:
- The input argument 'x' is not defined or is not of the correct data type.
- The input argument 'x' is a data type that cannot be converted to a matrix.
- There is a typo or syntax error in the code that is preventing the input argument 'x' from being correctly evaluated.
To resolve this error, you may need to double-check your code to ensure that the input argument 'x' is correctly defined and of the appropriate data type. You may also need to review any other functions or operations that are being used in conjunction with 'as.matrix' to ensure that they are functioning correctly.
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