How to show exact answers in MATLAB
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Hello everyone, I run into this exact answer problem with MATLAB pretty frequently. My problem is right now when I'm trying to do an inverse of a matrix containing square roots, it gives me answers in fractions or in decimals. I want it to show the square roots and other functions. How would I go about doing this? I've googled a while and all they say are precision values and rounding and what not, but nothing to do with these square roots.
2 comentarios
Karan Gill
el 14 de Nov. de 2017
Use symbolic arithmetic. See: https://www.mathworks.com/help/symbolic/choose-symbolic-or-numeric-arithmetic.html
As Walter answered, use
>> inv([sqrt(sym(21))])
ans =
21^(1/2)/21
Respuestas (3)
Mahdi
el 24 de Sept. de 2013
Why don't you try an approach where you use square the matrix to find out what the numbers are?
For example
MatrixSquared=Matrix.^2;
Then you would be able to see which numbers were square rooted. I would also suggest placing
format rat
before the code.
Matt J
el 24 de Sept. de 2013
Editada: Matt J
el 24 de Sept. de 2013
Sounds like you're trying to do a symbolic matrix inverse operation. The Symbolic Math Toolbox will let you do that, see
Shashank Prasanna
el 24 de Sept. de 2013
Use format to reset your display format or choose a different display format:
>> format
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