Convert multidimentional Array in Vector in AS3

I think you'll need to do a loop:

function convertToVector(numbers:Array):Vector.<Vector.<Vector.<Number>>> {
          var vector:Vector.<Vector.<Vector.<Number>>> = new Vector.<Vector.<Vector.<Number>>>();
          for(var i:int = 0; i < numbers.length; i++){
                    vector = new Vector.<Vector.<Number>>();
                    for(var ii:int = 0; ii < numbers.length; ii++){
                              vector[ii] = new Vector.<Number>();
                              for(var iii:int = 0; iii < numbers[ii].length; iii++){
                                        vector[ii][iii] = numbers[ii][iii];
                              }
                    }
          }
          return vector;
}

Also, in case it's helpful, you can declare vectors with values:

var vector:Vector.<Vector.<Vector.<Number>>> = new <Vector.<Vector.<Number>>>[
          new <Vector.<Number>>[
                    new <Number>[1, 2, 3]
          ],
          new <Vector.<Number>>[
                    new <Number>[4, 5, 6]
          ]
]

Cheers.

-Aaron