Matlab simplify boolean expression
27 次查看(过去 30 天)
显示 更早的评论
I want to simplify a boolean algebra expression. I have taken this example from matlab online help but it does not work:
simplify((a and b) or (a and (not b)), logic)
Any suggestion?
I am using matlab R2012a (7.14.0.739)
0 个评论
回答(3 个)
Geoff
2012-5-27
The expression:
(A && B) || (A && ~B)
Is logically equivalent to:
A
The reason is that both terms require A to be true, and the whole expression evaluates to true regardless of whether B is true or false. If you drew up a truth table for this, it'd be immediately obvious.
[EDIT] Hadn't clicked that the poster was talking about the symbolic math toolbox.
syms a,b;
simplify( (a & b) | (a & ~b) )
3 个评论
Alexander
2012-5-29
You have copied a MuPAD command. Did you use it inside a MuPAD Notebook? If not, type this at the MATLAB command prompt:
mupad
This will open a MuPAD Notebook. There, paste the input near the bracket (red text should appear) and press enter:
[ simplify((a and b) or (a and (not b)), logic)
a
If you don't want to open a MuPAD notebook, try this in MATLAB:
evalin(symengine, 'simplify((a and b) or (a and (not b)), logic)')
Though if you prefer to stay in MATLAB, you should take what Geoff suggests:
syms a b;
simplify((a & b) | (a & ~b))
(For some reason it did not work for me with the comma between a and b).
另请参阅
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!