how can i multiply blocks of a block matrix by a non block-matrix, block to elements?

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xosro 2016-4-11

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https://ww2.mathworks.cn/matlabcentral/answers/278358-how-can-i-multiply-blocks-of-a-block-matrix-by-a-non-block-matrix-block-to-elements

编辑： xosro 2016-4-11

i want multiply blocks of a block matrix by a non block matrix as size of the block matrix is same under blocks, with size non block matrix under elements. for example :

   0     1     0                         2   0   3   0 
   1     0     1                         0   2   0   3
   0     1     0         2     3         4   0   5   0  
                          *      4     5      =  0   4   0   5     
   1     0     1