[racket] how can I change only one element in the vector?

is this code right way to do it?
#lang racket
(define v (build-vector 2 (λ (n)
                            (build-vector 2 (λ (n)
                                              (vector "1" "2" "3"))))))

  (vector-set! (vector-ref (vector-ref v 0) 0) 0  "2")
  v

On 20 November 2010 17:31, 김태윤 <kty1104 at gmail.com> wrote:

> thank you !
> could you tell me how to make new vector that does not refer to a single
> vector?
>
>
> On 20 November 2010 17:09, Neil Van Dyke <neil at neilvandyke.org> wrote:
>
>> "make-vector" is creating a new vector populated with *references* to a
>> single #("1" "2" "3") vector, *not* *copies* of the #("1" "2" "3") vector.
>>
>> Since you've created one #("1" "2" "3") vector, changing it through one
>> reference changes all references to it.
>>
>> (Aside to PLT people: This might be an example of having the default
>> writer show sharing could actually be helpful to beginners.)
>>
>> --
>> http://www.neilvandyke.org/
>>
>
>
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