SRL Archive - Research & Development Lounge

exactly as title states, i understand you have to setlength of all arrays, but how do you set length of a matrix? a t2d array… is it same function and it will set length for both the arrays [y][x], or do i have to do it individually somehow? my [x] will be twice the size of [y] so how do i approach this?

You just iterate through each row:

procedure Test();
const
  ROWS = 3;
  COLS = 6;
var
  i: Int32;
  Matrix: T2DIntegerArray; //or Array of Array of Int32;
begin
  SetLength(Matrix, ROWS);
  for i := 0 to High(Matrix) do
    SetLength(Matrix[i], COLS);
end;

The result is a 3x6 matrix.

I think you can switch rows and columns as long as you keep track of which system you're using.

so setlength (var) sets length of first array and setlength (var[x]) sets length of the 2nd array of array x?

beautiful, didnt get the results i wanted but im gonna fuck around with it, just tested it out and worked perfectly, thank you for such a quick response

From: Citrus
You just iterate through each row:

procedure Test();
const
  ROWS = 3;
  COLS = 6;
var
  i: Int32;
  Matrix: T2DIntegerArray; //or Array of Array of Int32;
begin
  SetLength(Matrix, ROWS);
  for i := 0 to High(Matrix) do
    SetLength(Matrix[i], COLS);
end;

The result is a 3x6 matrix.

I think you can switch rows and columns as long as you keep track of which system you're using.

SetLength does this internally. It will accept a parameter for each dimension.

SetLength(Matrix, 3, 6);

Awesome, thats much easier.