matlabrepmat(,matlab中 repmat([1:N]',[1,2]),p)什么意思？

满意答案

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2013.12.31

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repmat是将矩阵按要求扩增。 repmat([1:N]&＃39;,[1,2]))：就是将[1:N]&＃39;看成一个整体，就相当于一个元素，将这个大的“元素”扩增为1x2的矩阵，如果p是整数，则就是将1x2矩阵p倍输出，即三维扩增。以下是Matlab的help结果： REPMAT Replicate and tile an array. B = repmat(A,M,N) creates a large matrix B consisting of an M-by-N tiling of copies of A. The size of B is [size(A,1)*M, size(A,2)*N]. The statement repmat(A,N) creates an N-by-N tiling. B = REPMAT(A,[M N]) accomplishes the same result as repmat(A,M,N). B = REPMAT(A,[M N P ...]) tiles the array A to produce a multidimensional array B composed of copies of A. The size of B is [size(A,1)*M, size(A,2)*N, size(A,3)*P, ...]. REPMAT(A,M,N) when A is a scalar is commonly used to produce an M-by-N matrix filled with A&＃39;s value and having A&＃39;s CLASS. For certain values, you may achieve the same results using other functions. Namely, REPMAT(NAN,M,N) is the same as NAN(M,N) REPMAT(SINGLE(INF),M,N) is the same as INF(M,N,&＃39;single&＃39;) REPMAT(INT8(0),M,N) is the same as ZEROS(M,N,&＃39;int8&＃39;) REPMAT(UINT32(1),M,N) is the same as ONES(M,N,&＃39;uint32&＃39;) REPMAT(EPS,M,N) is the same as EPS(ONES(M,N))

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