how can i solve simultaneous matrix equations?

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

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

Sorry, format is a bit messed up. The output vector has two non-zero entries and the rest are all zero.
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!