To find the maximum row sum in a matrix in AMPL

[ashish.s...@gmail.com]

I am trying to find the maximum row sum in a matrix in AMPL. 

The code that I have written is 

param I_max;             # number of rows in the intensity matrix

param J_max;           # number of columns in the intensity matrix

# sets

set I := 1 .. I_max ; # set of rows of the intensity matrix , {1,...,I_max}

set J := 1 .. J_max ; # set of columns of the intensity matrix , {1,...,J_max}

# parameters

param A{I,J} >= 0, integer;  # given intensity matrix

param T_max = max( {i in I} : sum{j in J} A[i,j] );  

The error is 

i is undefined
context:  param T_max = max{ {i in I} : sum{j in J}  >>> A[i,j] <<<  }; 

Please help

[victor.z...@gmail.com]

You don't need a colon after {i in I}:

  max {i in I} sum{j in J} A[i,j];

See the example of iterated max in the AMPL book.

HTH,

Victor

--
You received this message because you are subscribed to the Google Groups "AMPL Modeling Language" group.
To unsubscribe from this group and stop receiving emails from it, send an email to ampl+uns...@googlegroups.com.
To post to this group, send email to am...@googlegroups.com.
Visit this group at http://groups.google.com/group/ampl.
For more options, visit https://groups.google.com/d/optout.