[eigen] inf-norm of complex-matrix columns |

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*To*: eigen@xxxxxxxxxxxxxxxxxxx
*Subject*: [eigen] inf-norm of complex-matrix columns
*From*: Manoj Rajagopalan <rmanoj@xxxxxxxxx>
*Date*: Thu, 3 Jun 2010 15:21:38 -0400
*Organization*: EECS Dept., University of Michigan, Ann Arbor, MI, USA

Hi,
Can someone help me come up with an expression to calculate the
infinity-norm of the columns of a matrix, treated as vectors? I want to
calculate the modulus of the complex entries in each column, and the maximum
within that column. Therefore, my result should be a vector-expression whose
length is the number of rows. In the following case, 4.
MatrixXcd M(5,4);
M.setRandom();
M.colwise().?????
Thanks,
Manoj