【简答题】
对于指标形式的矩阵运算$ left[ {egin{array}{*{20}{c}} {{a_{11}}}&{{a_{12}}}&{{a_{13}}} \ {{a_{21}}}&{{a_{22}}}&{{a_{23}}} \ {{a_{31}}}&{{a_{32}}}&{{a_{33}}} end{array}} ight] cdot left[ {egin{array}{*{20}{c}} {{b_{11}}}&{{b_{12}}}&{{b_{13}}} \ {{b_{21}}}&{{b_{22}}}&{{b_{23}}} \ {{b_{31}}}&{{b_{32}}}&{{b_{33}}} end{array}} ight] $,将写成哑指标形式,其正确的是
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参考解析:
举一反三
【单选题】已知A=[1,2,3;4,5,6;7,8,9;10,11,12;13,14,15] ,经过下列运算后d的值是( ) >>d=sub2ind(size(A),4,2)