How to solve a equation system with more constraints than unkwons?
How to solve a equation system with more constraints than unkwons?
(OP)
I'm using mathcad to solve an equation system with Given and find.
I had 10 variables (or unkwon values) and 10 equations. My call to find was with 10 parameters.
The problem I'm facing now is that I found the real value for 1 of those 10 variables and now I don't know what equations to remove.
With that known value, I can use one of the equations to find another value and thus, I have 2 known values. I remove that equation but nowI have to remove one more because I have 9 equations for 8 unkowns.
The problem is that when I remove equations 4, 5, 6, 7, 8, 9 or 10 then I get an error about unkown variables not defined or I get not real values but when I remove equation 2 or 3, I get real values but very different.
How can I choose the equation to remove or use more equations than unkown values?
I had 10 variables (or unkwon values) and 10 equations. My call to find was with 10 parameters.
The problem I'm facing now is that I found the real value for 1 of those 10 variables and now I don't know what equations to remove.
With that known value, I can use one of the equations to find another value and thus, I have 2 known values. I remove that equation but nowI have to remove one more because I have 9 equations for 8 unkowns.
The problem is that when I remove equations 4, 5, 6, 7, 8, 9 or 10 then I get an error about unkown variables not defined or I get not real values but when I remove equation 2 or 3, I get real values but very different.
How can I choose the equation to remove or use more equations than unkown values?





RE: How to solve a equation system with more constraints than unkwons?
TTFN
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RE: How to solve a equation system with more constraints than unkwons?
I just tried to use Minerr with 10 constraints and 9 unknowns the values I get for 6 of those unkowns are extremely dependent on the initial value and the answer is not close to what I think it should be.
When using Find with 10 constraints and 9 unknowns I get an error.
RE: How to solve a equation system with more constraints than unkwons?
TTFN
FAQ731-376: Eng-Tips.com Forum Policies