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June 02, 2017 Guide - Migrating from std.experimental.ndslice to mir-algorithm | ||||
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Hi, Just tried migrating from std.experimental.ndslice to mir-algorithm. Is there a guide on how migrate old code? I used the following imports before and using then with ndslice. import std.experimental.ndslice; import std.algorithm : each, max, sort; import std.range : iota, repeat; simplified example of how it was used. auto a = cr.iota.sliced(r, c); auto b = a.reshape(c, r).transposed!1; auto c = a.reversed!1; auto d = a.reshape(c, r).transposed!1.reversed!1; auto f = new int[cr].sliced(r, c); auto h = f.transposed(1); how can I do the following in mir-algorithm. Note: I will be going through the documentation. Zz |
June 03, 2017 Re: Guide - Migrating from std.experimental.ndslice to mir-algorithm | ||||
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Posted in reply to Zz | On Friday, 2 June 2017 at 16:08:20 UTC, Zz wrote: > Hi, > > Just tried migrating from std.experimental.ndslice to mir-algorithm. > > Is there a guide on how migrate old code? > > I used the following imports before and using then with ndslice. > > import std.experimental.ndslice; > import std.algorithm : each, max, sort; > import std.range : iota, repeat; > > simplified example of how it was used. > auto a = cr.iota.sliced(r, c); > auto b = a.reshape(c, r).transposed!1; > > auto c = a.reversed!1; > auto d = a.reshape(c, r).transposed!1.reversed!1; > > auto f = new int[cr].sliced(r, c); > auto h = f.transposed(1); > > how can I do the following in mir-algorithm. > > Note: I will be going through the documentation. > > Zz Hello Zz, std.experimental.ndslice -> mir.ndslice std.range : iota, repeat -> mir.ndslice.topology: iota, repeat; std.algorithm : each; -> mir.ndslice.algorithm: each; std.algorithm : max; -> mir.utility: max; std.algorithm : sort; -> mir.ndslice.sorting: sort; Note, that Mir functions has different semantics compared with Phobos! For example, each iterates deep elements, so should be combined with `pack` to iterates rows instead of elements. Ndslices work with Phobos functions but it is suggested to use Mir analogs if any. // Mir's iota! It is already 2D ndslice :-) auto a = [r, c].iota; auto b = a // returns flattened iota, a has Contiguous kind, // so the result type would be equal to `iota(r*c)` .flattened // convert 1D iota ndslice to 2D iota ndslice .sliced(c, r) // It is required to use transposed // Convert ndslice kind from Contiguous to Universal. .universal // Transpose the Universal ndslice .transposed; auto c = a.universal.reversed!1; auto d = a.flattened.sliced(c, r).universal.transposed!1.reversed!1; // see also `rotated` auto f = slice!int(c, r); // new int[cr].sliced(r, c); works too. auto h = f.universal.transposed(1); ------- Mir ndslices have three kinds: http://docs.algorithm.dlang.io/latest/mir_ndslice_slice.html#.SliceKind If you have any questions feel free to ask at the Gitter: https://gitter.im/libmir/public Best, Ilya Best, Ilya |
June 03, 2017 Re: Guide - Migrating from std.experimental.ndslice to mir-algorithm | ||||
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Posted in reply to 9il | On Saturday, 3 June 2017 at 05:21:13 UTC, 9il wrote:
> On Friday, 2 June 2017 at 16:08:20 UTC, Zz wrote:
>> Hi,
>>
>> Just tried migrating from std.experimental.ndslice to mir-algorithm.
>>
>> Is there a guide on how migrate old code?
>>
>> I used the following imports before and using then with ndslice.
>>
>> import std.experimental.ndslice;
>> import std.algorithm : each, max, sort;
>> import std.range : iota, repeat;
>>
>> simplified example of how it was used.
>> auto a = cr.iota.sliced(r, c);
>> auto b = a.reshape(c, r).transposed!1;
>>
>> auto c = a.reversed!1;
>> auto d = a.reshape(c, r).transposed!1.reversed!1;
>>
>> auto f = new int[cr].sliced(r, c);
>> auto h = f.transposed(1);
>>
>> how can I do the following in mir-algorithm.
>>
>> Note: I will be going through the documentation.
>>
>> Zz
>
> Hello Zz,
>
> std.experimental.ndslice -> mir.ndslice
>
> std.range : iota, repeat -> mir.ndslice.topology: iota, repeat;
> std.algorithm : each; -> mir.ndslice.algorithm: each;
> std.algorithm : max; -> mir.utility: max;
> std.algorithm : sort; -> mir.ndslice.sorting: sort;
>
>
> Note, that Mir functions has different semantics compared with Phobos!
> For example, each iterates deep elements, so should be combined with `pack` to iterates rows instead of elements.
>
> Ndslices work with Phobos functions but it is suggested to use Mir analogs if any.
>
> // Mir's iota! It is already 2D ndslice :-)
> auto a = [r, c].iota;
>
> auto b = a
> // returns flattened iota, a has Contiguous kind,
> // so the result type would be equal to `iota(r*c)`
> .flattened
> // convert 1D iota ndslice to 2D iota ndslice
> .sliced(c, r)
> // It is required to use transposed
> // Convert ndslice kind from Contiguous to Universal.
> .universal
> // Transpose the Universal ndslice
> .transposed;
>
> auto c = a.universal.reversed!1;
> auto d = a.flattened.sliced(c, r).universal.transposed!1.reversed!1; // see also `rotated`
>
> auto f = slice!int(c, r); // new int[cr].sliced(r, c); works too.
> auto h = f.universal.transposed(1);
>
> -------
> Mir ndslices have three kinds: http://docs.algorithm.dlang.io/latest/mir_ndslice_slice.html#.SliceKind
>
> If you have any questions feel free to ask at the Gitter:
> https://gitter.im/libmir/public
>
> Best,
> Ilya
>
> Best,
> Ilya
Thanks
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