How can I apply bsxfun like functionality at Eigen?

问题:

Suppose I have a matrix A which is n x n matrix and I have a vector b which is n x 1 vector and I want to calculate the following implementation in Eigen library.

bsxfun(@rdivide, A, b) 

How can I apply it Eigen ?

回答1:

How about this one:

Eigen::MatrixXf A(n,n); Eigen::VectorXf b(n);  A.cwiseQuotient( b.replicate(1,A.cols()) ) 

Here is one without replication, equivalent to bsxfun in MATLAB:

A.array().colwise() / b.array() 

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