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Re: List manipulation


xun wrote:

> Hello,
>
> I have something as following:
>
> a = Array[aa, {3, 3}];
> b = Array[bb, {3, 3}];
> c = Array[cc, {3, 3}];
> d = Array[dd, {3, 3}];
> A = {{a, b}, {c, d}} (* A consists of four blocks *)
> A // MatrixForm
>
> And I want a 6*6 matrix (a list of 6 lists) just as A looks like.
> For example, the first row should be
>
> aa[1,1],aa[1,2],aa[1,3],bb[1,1],bb[1,2],bb[1,3]
>
> etc....
>
> How to get it easily?
>
> Many thanks.
> Xun


MapThread[Join, MapThread[Join, {{a, b}, {c, d}}]]

Cheers,
Phil


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