[SOLVED] Solve System Problem.

[rodolfonobrega]

Hi, first of all, sorry for posting in English, but I did not find any posts in the forum that are in English ...

I'm trying to make a program, and at the end of the code, I check which variables are missing to be calculated and solve them through a system ... to do this, I keep the list of unused variables in another variable, but texas Does not accept such action.

In the following image I gave an example of the problem!






Is there any way to resolve this?

Thank you all.

[Bisam]

You may force the OS to replace "vars" by its value before solving using string tools as shown below :

Code: Tout sélectionner

vars:={a,b}
syst:={a+b=2,2a+b=3}
expr("solve(" & string(syst) & "," & string(vars) & ")")

[rodolfonobrega]

You may force the OS to replace "vars" by its value before solving using string tools as shown below :

Code: Tout sélectionner

vars:={a,b}
syst:={a+b=2,2a+b=3}
expr("solve(" & string(syst) & "," & string(vars) & ")")

Hi, Bisam, thankyou so much for responding!
I had just thought of this solution and it worked!

my code look like this: (same ideia)

Code: Tout sélectionner

d:="{a,b}"
expr("solve([[a+b=2][2*a+b=3]],"&d&")")

well...

Thanks a lot for your help!