要实现一下功能，这里$\bf{x}_i$为行向量
$${\bf{A}} = \left[ \begin{array}{l}
{{\bf{x}}_1}\\
{{\bf{x}}_2}
\end{array} \right],{\bf{h}} = \left[ \begin{array}{l}
{h_1}\\
{h_2}
\end{array} \right] \Rightarrow B = \left[ \begin{array}{l}
{h_1}{\bf{x}}_1^T{{\bf{x}}_1}\\
{h_2}{\bf{x}}_2^T{{\bf{x}}_2}
\end{array} \right]$$
>> A={[1 2] [2 3]};
h=[2 5];
X=cellfun(@(x)h(x)*A{x}'*A{x},num2cell(1:2)','un',0);
B = cell2mat(X)
B =
2 4
4 8
20 30
30 45
