Solving ODE

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zizo
zizo 2011-5-31
[EDIT: 20110530 22:44 CDT - clarify - WDR]
hey . how i solve this linear equations (ODE) in matlab
x-y-5z-5=0
3x+y-3z=5
y+4=z
  1 个评论
Walter Roberson
Walter Roberson 2011-5-31
Those are not ODE: there is no differential term anywhere in them.

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Walter Roberson
Walter Roberson 2011-5-31
x_y_z = [1 -1 -5;3 1 -3;0 1 -1] \ [5 5 -4].';
And crosschecking the second line:
>> 3*x_y_z(1)+x_y_z(2)-3*x_y_z(3) ans = 5
The values in the matrix to the left of the \ have been read off from the x, y, and z coefficients of the linear equations. The values in the vector to the right of the \ have been read off from the implicit right hand sides (constant terms) of the linear equations.

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zizo
zizo 2011-5-31
thanks man

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