Programming

Sorting Row Vectors

The sortrows function keeps the elements of each row in their original order but sorts the entire row vectors according to the order of the elements in the first column:

• rowsort = sortrows(A)
  rowsort =
      2.3114    4.5647    7.9194    9.3547    3.5287
      6.0684    0.1850    9.2181    9.1690    8.1317
      9.5013    7.6210    6.1543    4.0571    0.5789
  

To run the sort based on a different column, include a second input argument that indicates which column to use. This example sorts the row vectors so that the elements in the third column are in ascending order:

• rowsort = sortrows(A, 3)
  rowsort =
      9.5013    7.6210    6.1543    4.0571    0.5789
      2.3114    4.5647    7.9194    9.3547    3.5287
      6.0684    0.1850    9.2181    9.1690    8.1317
  
  issorted(rowsort(:, 3))
  ans =
       1
  

Sorting the Data in Each Row

Operating on Diagonal Matrices

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