Output is giving me "Empty sym: 0-by-1"
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Nicholas Gillam
on 11 Nov 2019
Answered: Walter Roberson
on 11 Nov 2019
syms s
g = (s^2-2*s+2)/((s+2)*(s+4)*(s+5)*(s+6))
x = diff(g)
b = roots(x)
I'm trying to solve for the roots of the differentiated function, but I'm getting the "Empty sym: 0-by-1" output, and I'm unsure why. I've followed the syntax on how everything should be, but I don't know why this is being outputted.
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Accepted Answer
Walter Roberson
on 11 Nov 2019
roots() is not explicitly defined for symbolic expressions, and will not work for scalar symbolic expressions. It is also only defined for polynomials, but g is not a polynomial. Instead use
b = solve(x);
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More Answers (1)
JESUS DAVID ARIZA ROYETH
on 11 Nov 2019
solution:
syms s
g = (s^2-2*s+2)/((s+2)*(s+4)*(s+5)*(s+6))
x = diff(g)
b = double(solve(x))
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