How do I make fprintf to show symbolic math?
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Rustem
le 14 Fév 2018
Commenté : Walter Roberson
le 28 Mai 2020
I am solving for sigma_y and I used the solve function and symbolic math. In the end I need fprintf to display the formula in the form 'v*sigz', but it doesn't do this with the current fprintf. The pictures are there to better explain what I am doing.
syms epsy E sigy v sigx sigz
epsy = 0
sigx = 0
eqn = epsy == (1/E)*(sigy-(v*(sigx+sigz)))
sigy = solve(eqn,sigy)
fprintf('%0.2f mm.\n',sigy)
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Walter Roberson
le 14 Fév 2018
fprintf('%s mm.\n', char(sigy))
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Walter Roberson
le 25 Mai 2020
You cannot fprintf symbolic expressions in "pretty" formats. fprintf can only output characters in the first 16 bits of the Unicode planes.
https://www.compart.com/en/unicode/U+2093 shows subscript x in Unicode. However there is no subscript y.
Anything like the tall { cannot be created in Unicode.
The closest you can get in such cases is to emit encodings of the equations, such as using latex or MathML.
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Lam Nguyen Van
le 28 Mai 2020
Help me! I want to creat a Symbolic Matrix:
A = [ε ε ε;
ε ε ε]
I used the command, but:
syms A epsilon
epsilon = [ char(949) char(949) char(949)
char(949) char(949) char(949) ]
epsilon (2)
epxilon = sym('epsilon', [2 3])
A = zeros (2, 3);
for i = 1:6
epsilon = char(949);
A(i) = epsilon;
end
A
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Walter Roberson
le 28 Mai 2020
You cannot do it in a nicely printable form in normal MATLAB .m files.
However in Live Script, you get a nice display if you use
syms epsilon
A = ones(2,3) * epsilon
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