system of equations

[Marius_P]

Hello,

I would like to solve a system of equations, but I receive the error "The symbolic result is too large to display". I need the symbolic result, because I would like to calculate the parameters of the electric circuit for which I wrote this system of equations. I'd appreciate it if you could help me with this issue.

I have attached the relevant file.

Thank you.

Marius

[ValeryOchkov]

[Marius_P]

Hi Valery,

I tried to do attribution, but it didn't work.

[Werner_E]

You can turn the result into a function of the unknowns.

Use "result(xIcb0, xbeta,xR1043,.....) := [  ] solve... "

You will still get the message about the expression being too large, but you can use that function an can evaluate it numerically for any value of the unknown variables.

[Marius_P]

Hello Werner,

Thank you very much for your reply.

Could you tell me please what do you mean by "[ ]" before solve?

[Marius_P]

I forgot to mention that I am using Mathcad Prime version.

[Marius_P]

I used the function but unfortunately it doesn't work.

Please see attached the updated file.

Please let me know if there is any misinterpretation of your suggestion.

Thank you.

[Werner_E]

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@Marius_P wrote:

Hello Werner,

Thank you very much for your reply.

Could you tell me please what do you mean by "[ ]" before solve?

---

It just meant the vector with the equations followed by the symbolic "solve" - all unchanged as you wrote it in your sheet.

What I wanted to say was that you simply replace the variable result by the function definition result(xIcb0, xbeta,xR1043,.....).

[Marius_P]

Hello Werner,

Could you check please the attached file to see if I understood it and implemented correctly? 

[Werner_E]

You defined a function which gets you just the first of the twelve values.

I had in mind y function which would return all 12 values at once by putting the function definition in front of the expression above.

You may also notice that the arguments you feed into a function must nOT have the same name which you used when you defined the function. So the local assignments like xR950 <- R950, etc are not necessary. Simply use R950 when you call your function.

Furthermore you used square brackets which defines a matrix. So your result [3.256]mA is a 1x1 matrix which, as I think, you did not intend.

ALL should now be a 12 x 1  row vector with all results.

[Werner_E · Accepted solution]

As your sheet is too complex for me to edit and show what I mean, here is a simple worksheet with some thoughts and explanations.

BTW, you may consider closing your other thread
Re: solve of equation with combination of coeffici... - PTC Community
or come back and ask if its not solved.