Equations to Matrix Solve

2021 11 9
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更新时间：2021 11 9
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I have a question about equations to matrix. [X,b] = equationsToMatrix(equation);
Y = inv(X);
T=double(Y*b)
and my equations matrix looks like this
[ T11, T12, T13, T14]
[T11 - 4*T21 + 2*T22 + T31, T12 + T21 - 4*T22 + T23 + T32, 2*T13 + T22 - (1876*T23)/5 + T33 + 352640, T24]
[T21 - 4*T31 + 2*T32 + T41, T22 + T31 - 4*T32 + T33 + T42 + 16512, 2*T23 + T32 - (1876*T33)/5 + T43 + 352640, T34]
[T31 - 4*T41 + 2*T42 + T51, T32 + T41 - 4*T42 + T43 + T52, 2*T33 + T42 - (1876*T43)/5 + T53 + 352640, T44]
[T41 - 4*T51 + 2*T52 + T61, 2*T42 + 2*T51 - (1886*T52)/5 + T53 + T62 + 352640, T43 + T52 - (1866*T53)/5 + 352640, T54]
[T51 - 4*T61 + 2*T62 + T71, 2*T52 + T61 - (1876*T62)/5 + T72 + 352640, T63, T64]
[ T71, T72, T73, T74]
What will my solution T be ?I get a answer but I am not sure which Values in the column relate to which variable. Are they in order T11 T12 or some other kind of order. I ask because the first number I get isnt does correspond to T11 should be.
Thanks

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回答（1 个）

Sulaymon Eshkabilov
编辑：Sulaymon Eshkabilov 2021-11-9

0 个投票

This exercises can be solved realtively easy using some symbolic toolbox fcns such as coeffs().
See this doc: https://www.mathworks.com/help/symbolic/sym.coeffs.html
Should you have a difficulty how to employ coeffs() for this exercise, please post the initial part of your exercise by which you have gotten your matrix equation.

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