writing a function in matlab

i want to know that what will be the matlab code to write it.

[KSSV]

REad about defining a matrix in MATLAB. It is very simple.

[J. Alex Lee]

and also looks like you want to read up on some basic linear algebra. But not clear what's wrong with the commas..is it a typo?

→ ?

[Steven Lord]

J. Alex Lee: issue with the LaTeX code used to layout that expression.

X_2,1 ->

X_{2,1} ->