On 11/14/2013 02:18 PM, TheFlyingFiddle wrote:
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];
}
}
transversal() is useful too: :)
http://dlang.org/phobos/std_range.html#transversal
Ali
