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Re: How to make a loop for this problem!
*To*: mathgroup at smc.vnet.net
*Subject*: [mg75380] Re: [mg75355] How to make a loop for this problem!
*From*: Bob Hanlon <hanlonr at cox.net>
*Date*: Fri, 27 Apr 2007 05:26:35 -0400 (EDT)
*Reply-to*: hanlonr at cox.net
uniqueArrays[n_Integer?Positive] :=
Module[{data = {}, t, adt},
While[Length[data] < n,
t = Table[Random[Integer], {3}, {3}];
adt = Append[data, t];
If[Length[Union[adt]] != Length[data],
data = adt]];
data];
data=uniqueArrays[512];
Each element of data is a 3x3 array
data[[38]]
{{0, 0, 1}, {1, 0, 0}, {0, 1, 0}}
And@@(Dimensions[#] == {3,3}& /@ data)
True
There are 512 arrays
Length[data]==512
True
There are no duplicates
Length[Union[data]]==Length[data]
True
Bob Hanlon
---- pskmaths at googlemail.com wrote:
> Hi all,
>
> This comand:
> A = Array[Random[Integer] &, {3, 3}]
> generates a 3x3 random matrix its terms between 0 and 1.
>
> I need to make a loop that geerates a finite number of matrices, let's
> say 512 and this loop check that non of the matrices is equal to
> another one (no repeated matrices)
>
> I can geerate thoses random, matrices with this command:
> Do[Print[Array[Random[Integer] &, {3, 3}]], {512}]
> but I may have two matrices that are equal and also as far as I know I
> cann't use the out put because of the command, Print.
>
>
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