help please, can someone help fix my code try and find what i have wrong because hardy cross part does not want to run, it states "cross product can only be calculated for three component vectors $(3$ rows x $1$ collumn$)$ please refer to image $N$:$=\left[\begin{array}{cccccccccccccccc}-1& 0& 1& -0& 0& -1& -1& 1& 0& 0& 0& 0& 1& -1& 1& 0\end{array}\right]$

$0$

$0$

$0^T$

HardyCross$(h,dh,Q,N,$TOL$)$:$=|[L$:$=$cols$(N)$

$P$:$=$rows$(N)]$