how to create on an efficient way zeros in a symbolic matrix?

hey,

I want to create a matrix/array A with size(n,2) (for arbitrary n) such that

A(:,1) = zeros(n,1)
A([1:n-1],2) = 0;
A(n,2) = x (with x a symbolic, in matlab written as 'sym x' )

How do I do it on a efficient way?

Answer 1

[MA]

syms x
n=4;
A=sym(zeros(n,2));
A(:,1) = zeros(n,1);
A([1:n-1],2) = 0;
A(n,2) = x;
A

Answer 2

[Walter Roberson]

A = [zeros(n,2,'sym') ; 0, x];

Answer 3

[Sulaymon Eshkabilov]

syms x
n=4;
A=sym(zeros(n,2));
% A(:,1) = zeros(n,1);   % NOT Necessary
% A([1:n-1],2) = 0;      % NOT Necessary     
A(n,[1,2]) = x           %#OK  

A = 

[Walter Roberson]

A(n, 1) should not be x

[Sulaymon Eshkabilov]

Yes, you are right. But I put A(n, [1, 2]) =x just as an example.