Find solution for two matrix, ome has symbolic unknown in it

Question

Ceasar_Ullrich9 2020-2-4

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回答： fred ssemwogerere 2020-2-4

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Basically I have a matrix

A = [0 -1 -2; 2 1 2; 0 0 0 ]

then three syms

syms a
syms b
syms c

and another matrix, named answer

answer =
 
[                                   0, (2*(a - b))/(b - a + c) - (2*c)/(b - a + c), b*(c/(b - a + c) - (a - b)/(b - a + c)) - a*((2*c)/(b - a + c) - (2*(a - b))/(b - a + c)) + c*((2*c)/(b - a + c) - (2*(a - b))/(b - a + c))]
[ b/(b - a + c) - (a - c)/(b - a + c),         b/(b - a + c) - (a - c)/(b - a + c),                                                   a*(b/(b - a + c) - (a - c)/(b - a + c)) - b*(b/(2*(b - a + c)) - (a - c)/(2*(b - a + c)))]
[                                   0,                                           0,                                                                                                                                           0]
 

I would like to find values for a,b,c so that matrix A equals matrix answer

How can I do that?

Thanks

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Answer 1

fred ssemwogerere 2020-2-4

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/503596-find-solution-for-two-matrix-ome-has-symbolic-unknown-in-it#answer_413735

One option is to use the "solve" function, with independent asssignment of equations in your matrix: "answer" to each value of the matrix: "A" . It should work nicely.