MATLAB实现矩阵分块相乘

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

MATLAB实现矩阵分块相乘

原文：http://www.cnblogs.com/huadongw/p/5049986.html