最简单的解决方案是首先使用沿所需维度的逐元素乘法和求和来计算范数:

The simplest solution would be computing the norms first using element-wise multiplication and summation along the desired dimensions:

normA = sqrt(sum(A .^ 2, 2));
normB = sqrt(sum(B .^ 2, 1));

normA和normB现在分别是列向量和行向量.要将A * B中的相应元素除以normA和normB，请使用 bsxfun 像这样:

normA and normB are now a column vector and row vector, respectively. To divide corresponding elements in A * B by normA and normB, use bsxfun like so:

C = bsxfun(@rdivide, bsxfun(@rdivide, A * B, normA), normB);