How to use qr for symbolic matrix in R2013?

please help me to know how I can decompose the symbolic matrix such as [s 1;1 s] in Matlab R2013?

Answer 1

[Walter Roberson]

The specific interface for symbolic qr was introduced in R2014a.

You will need to use http://www.mathworks.com/help/symbolic/mupad_ref/linalg-factorqr.html

syms s
A_QR = feval(symengine, 'linalg::factorQR', [s 1; 1 s])

[Amir Heydari]

Thank you Walter is there any command to have the answer in real domain and to avoid the complex answer?

[Walter Roberson]

syms s real

might perhaps avoid it.