how to make nxn matrix
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WonJong We
on 14 Apr 2021
Commented: WonJong We
on 15 Apr 2021
I want to make nxn matrix by follweing rule
n=input
first and last is 1
how can do it?
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/583416/image.png)
This is the original formula.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/583541/image.jpeg)
clc;
n=input
A=(n ; n)???
2 Comments
Accepted Answer
Walter Roberson
on 14 Apr 2021
n = 7
d = ones(1,n-2)/2;
M = zeros(n,n) + diag([0,d],+1) + diag([d,0],-1);
M(1) = 1; M(end) = 1;
M
9 Comments
Walter Roberson
on 15 Apr 2021
n=3;
%n=input ('put your n=')
d = ones(1,n-1)/2;
M = zeros(n+1,n+1) + diag([0,d],+1) + diag([d,0],-1);
M(1) = 1; M(end) = 1;
M
T = [sym('T0') ; sym('T',[n 1]) ]
Tvals = T;
Tvals(1) = 500;
Tvals(n+1) = 300; %Tn is at position n+1
MT = subs(M*T, T, Tvals)
eqn = MT == T
sol = solve(eqn)
sol.T0
sol.T1
sol.T2
sol.T3
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