MATLAB Answers

How to solve equation AX=B where A is symmetric like matrix ?

9 views (last 30 days)
Phanindra Reddy Ravi
Phanindra Reddy Ravi on 31 Jan 2021
Answered: Shubham Rawat on 3 Feb 2021
Consider Ax=B where A is 4x4 and two values of x are known and 2 values of B are known. Then how to find other four unknowns?
  1 Comment
John D'Errico
John D'Errico on 1 Feb 2021
Think about how you would solve the problem by hand. You would convert it to a problem wehre you mosve the constant (known) terms to the right hand side. Then you would move the unknowns to the left hand side. Now you would create a NEW matrix that would describe that system, and solve it, using backslash.
Or, you could be lazy, just use solve.

Sign in to comment.

Answers (1)

Shubham Rawat
Shubham Rawat on 3 Feb 2021
Hi Phanindra,
You may look use this code for your reference:
syms b1 b2 x1 x2
A = magic(4); %random 4*4 matrix
x = [x1;x2;4;5];
b = [6;7;b1;b2];
S = solve(A*x == b); %used solve to solve these equations
% resuls
S.x1
S.x2
S.b1
S.b2
Hope this Helps!

Tags

Community Treasure Hunt

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

Start Hunting!

Translated by