#### ramani

##### Member level 4

**tridiagonal matrix matlab**

hi to all,

what is the syntax used in matlab to form tridiagonal matrix from the available lower,main and upper diagonal elements.

if i use T1=diag(md1)+diag(ld1,-1)+diag(ud1,1);,

it is not working for 2×2 tridiagonal matrix.

for 2×2 tridiagonal matrix all elements should present.

is there any matlab program available for this?