how can i solve simultaneous matrix equations?

5 views (last 30 days)
I hvae to solve the simultaneous matrix equations
X*A=0 and X*e=1 where X is a row vector of finite dimension 1Xu and e =ones(u1,1)
I tried the following How can I Solve simultaneous matrix equation X*A=0 and X*e=1 where X a row vector ,e coloumn vector with all entries one.? i have tried
x=sym('x',[1 u1])
e=ones(u1,1)
eqn=[x*A==0 ,x*e==1]
solx=solve(eqn,x)
but the answer i am getting is a structure but i need it as a matrix. can any one help me?

Accepted Answer

Walter Roberson
Walter Roberson on 10 Oct 2020
u1 = 5;
A = randi([-9 9], u1, 1); %u1 x 1
x=sym('x',[1 u1])
x = 
(x1x2x3x4x5)
e=ones(u1,1)
e = 5×1
1 1 1 1 1
eqn=[x*A==0 ,x*e==1]
eqn = 
(6x25x1x33x4+8x5=0x1+x2+x3+x4+x5=1)
solx=solve(eqn,x)
solx = struct with fields:
x1: [1×1 sym] x2: [1×1 sym] x3: [1×1 sym] x4: [1×1 sym] x5: [1×1 sym]
subs(x,solx)
ans = 
(611511000)
  2 Comments
Walter Roberson
Walter Roberson on 10 Oct 2020
Sorry, format is a bit messed up. The output vector has two non-zero entries and the rest are all zero.
Thresiamma N J
Thresiamma N J on 10 Oct 2020
Thanks a lot... it works well as per my requirement....

Sign in to comment.

More Answers (0)

Categories

Find more on Mathematics in Help Center and File Exchange

Community Treasure Hunt

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

Start Hunting!