由决策表求代数约简的代码
时间: 2024-03-23 13:42:30 浏览: 45
以下是一个简单的 Python 代码,可以实现由决策表求代数约简的功能:
```python
def simplify_decision_table(decision_table):
# 获取决策表中的行和列数
rows = len(decision_table)
cols = len(decision_table[0])
# 针对每个决策表的决策,求出其代数表达式
expressions = []
for i in range(1, cols):
expression = ""
for j in range(rows):
if decision_table[j][i] == "1":
condition = ""
for k in range(1, i):
if decision_table[j][k] == "0":
condition += "~" + chr(64+k)
else:
condition += chr(64+k)
expression += condition + " & "
expression = expression[:-3]
expressions.append(expression)
# 将代数表达式合并为一个大表达式
big_expression = " | ".join(expressions)
# 利用 SymPy 库进行代数约简
from sympy.logic import simplify_logic
simplified_expression = simplify_logic(big_expression)
# 将代数表达式转换为决策表
simplified_table = [[""]*(cols-1) for _ in range(rows)]
for i in range(rows):
for j in range(1, cols):
condition = ""
for k in range(1, j):
if decision_table[i][k] == "0":
condition += "~" + chr(64+k)
else:
condition += chr(64+k)
if condition == "":
simplified_table[i][j-1] = "1" if simplified_expression == "1" else "0"
else:
if simplified_expression == "1":
simplified_table[i][j-1] = "1" if eval(condition) else "0"
else:
simplified_table[i][j-1] = "1" if eval(condition + " & " + simplified_expression) else "0"
# 返回代数约简后的决策表
return simplified_table
```
其中,`decision_table` 是一个二维列表,表示决策表中的行和列。列表中的每个元素都是一个字符串,表示对应的条件和决策是否成立。在代码中,我们使用了 SymPy 库进行代数约简,因此需要先安装该库。
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