Re: select all rows (resp. columns) out of matrix

[TheFlyingFiddle]

On Thursday, 14 November 2013 at 22:06:28 UTC, seany wrote:

How do I access All rows (resp. columns ) of a Matrix / multidimensional array?

In scilab, you write array_var(:,row_index), colon meaning all columns, at that particular row given by row index will be selected.

can you, forexample, in D, write, array_var[0][] to select all elements (columns, in this case i believe?) of array_var[0] ?

unittest
{
  int[][] matrix = new int[][](n,m);

  //Getting a collumn is simple.
  int[] collumn0 = matrix[0];

  //Getting a row is trickier
  int[] row0;

  //Loop over all collumns
  foreach(i; matrix) {
    row0 ~= matrix[i][0];
  }
}