How to solve equations with more unknowns

1 次查看（过去 30 天）

Awais Saeed 2018-11-9

回答： Walter Roberson 2018-11-10

I want to write a code to find pi,pj and pk. How to solve these equations, all x and y terms are known.

Eq1 : x=pi.xi + pj.xj + pk.xk
Eq2 : y=pi.yi + pj.yj + pk.yk
Eq3 : pi + pj + pk = 1

Awais Saeed 2018-11-10

Yes it is multiplication(pi*xi). Pi,pj,pk are variables not struct.

Awais Saeed 2018-11-10

@walter roberson i have solved the equations with solve() command. But how with numeric \ operator

Walter Roberson 2018-11-10

A = [xi, xj, xk;
     yi, yj, yk;
      1,  1,   1];
b = [x;
     y;
     1];
sol = A\b;
pi = sol(1); pj = sol(2); pk = sol(3);

Mathematics and Optimization Symbolic Math Toolbox MuPAD Mathematics Equation Solving Numeric Solvers

在 Help Center 和 File Exchange 中查找有关 Numeric Solvers 的更多信息

Find the treasures in MATLAB Central and discover how the community can help you!

Translated by