0

Ok so I have an operator* for left scalar matrix multiplication that is correctly outputting for the first 4 outputs and not for the next 4.

If I have a matrix M2 with inputs [1,2;3,4;5,6;7,8] (the semicolon means next column), and multiplying it by 4, then I am getting the output:
[4,8;12,16;0,0;17,17]

I have no idea why it is doing it for the first half and not the second, here is my code below. Help is much appreciated.

template <class T>
matrix<T> operator*(const T & lh,const matrix<T> & rh) {
  
  matrix<T> result = rh;
  
  for (int i=0;i<rh.rows();i++) {   // .rows returns the number of rows
    for (int j=0;j<rh.cols();j++) {  // .cols returns the number of cols
      result.item(j,i) = lh * rh.item(i,j);  // item returns the item at (row,col)
    }   // j,i are switched here because otherwise it prints it incorrectly
  }  
  return result;  
}

Edited by sgriffin: n/a

2
Contributors
1
Reply
2
Views
7 Years
Discussion Span
Last Post by WaltP
0

I'd say there's probably something wrong with the rh.item matrix. Or switching the indecies is not the proper solution for your printing error.

This topic has been dead for over six months. Start a new discussion instead.
Have something to contribute to this discussion? Please be thoughtful, detailed and courteous, and be sure to adhere to our posting rules.