On Thursday, 29 April 2021 at 15:22:55 UTC, Newbie wrote:
> mir - Help on how to transform multidimentional arrays.
>
>
> ----------
> | 0  1  2|
> | 3  4  5|
> | 6  7  8|
> | 9 10 11|
> |12 13 14|
> ----------
> |15 16 17|
> |18 19 20|
> |21 22 23|
> |24 25 26|
> |27 28 29|
> ----------
>
> How can i transform it into the following types of arrays.
>
> ----------
> | 0 10 20|
> | 1 11 21|
> | 2 12 22|
> | 3 13 23|
> | 4 14 24|
> ----------
> | 5 15 25|
> | 6 16 26|
> | 7 17 27|
> | 8 18 28|
> | 9 19 29|
> ----------
>
> or
>
> ----------
> |29 19  9|
> |28 18  8|
> |27 17  7|
> |26 16  6|
> |25 15  5|
> ----------
> |24 14  4|
> |23 13  3|
> |22 12  2|
> |21 11  1|
> |20 10  0|
> ----------
>
> Regards,
> Newbie.

Forgot to add the the first array was created using the following code.
auto base = iota(2, 5, 3);

On Thursday, 29 April 2021 at 15:56:48 UTC, jmh530 wrote:
> On Thursday, 29 April 2021 at 15:26:15 UTC, Newbie wrote:
>> [snip]
>>
>> Forgot to add the the first array was created using the following code.
>> auto base = iota(2, 5, 3);
>
> What you're basically asking for the first one is to convert for row major to column major. There doesn't seem to be a specific function for that, but you can piece it together. The second one is just applying allReversed to the result of that. So we have:
>
> ```d
> /+dub.sdl:
> dependency "mir-algorithm" version="~>3.10.25"
> +/
>
> import std.stdio: writeln;
> import mir.ndslice.topology: iota, flattened, reshape, universal;
> import mir.ndslice.dynamic: transposed, allReversed;
>
> void main() {
>     auto x = iota(2, 5, 3);
>     int err;
>     auto y = x.flattened.reshape([3, 5, 2], err).transposed!(1, 2);
>     auto z = y.allReversed;
>
>     writeln(x);
>     writeln(y);
>     writeln(z);
> }
> ```

First of all thanks for your guidance and i modified your example to get the results I was looking for.

auto y2 = base.flattened.reshape([3, 5, 2], err).transposed!(1, 2);
produced the following.

---------
|0 10 20|
|1 11 21|
---------
|2 12 22|
|3 13 23|
---------
|4 14 24|
|5 15 25|
---------
|6 16 26|
|7 17 27|
---------
|8 18 28|
|9 19 29|
---------

and auto y2 = base.flattened.reshape([3, 2, 5], err).transposed!(1, 2);
gave me the result i was looking for.

---------
|0 10 20|
|1 11 21|
|2 12 22|
|3 13 23|
|4 14 24|
---------
|5 15 25|
|6 16 26|
|7 17 27|
|8 18 28|
|9 19 29|
---------

Thanks,
Newbie.