i wrote my own tensor library a while ago and it allows the more convenient matlab/python+numpy like syntax:

a[ _, 9, R(2, $, -3)]
these are allowed:
R() or _: full range for an index
R(a,b): a..b
R(a,b,s): when s>0, iota(a,b,s)
R(a,b,s): when s<0, iota(a,b,-s).reverse

Could we have this in ndslice?

On Saturday, 9 January 2016 at 00:26:42 UTC, Timothee Cour wrote:
> i wrote my own tensor library a while ago and it allows the more convenient matlab/python+numpy like syntax:
>
> a[ _, 9, R(2, $, -3)]
> these are allowed:
> R() or _: full range for an index
> R(a,b): a..b
> R(a,b,s): when s>0, iota(a,b,s)
> R(a,b,s): when s<0, iota(a,b,-s).reverse
>
> Could we have this in ndslice?


Is `a[ _, 9, R(2, $, -3)]`

equals to

`a[0..$, 9, 2..$].reversed!2.strided!2(3)`
or
`a[0..$, 9, 2..$].strided!2(3).reversed!2`
?

On Saturday, 9 January 2016 at 06:20:46 UTC, Ilya wrote:
> On Saturday, 9 January 2016 at 00:26:42 UTC, Timothee Cour wrote:
>> i wrote my own tensor library a while ago and it allows the more convenient matlab/python+numpy like syntax:
>>
>> a[ _, 9, R(2, $, -3)]
>> these are allowed:
>> R() or _: full range for an index
>> R(a,b): a..b
>> R(a,b,s): when s>0, iota(a,b,s)
>> R(a,b,s): when s<0, iota(a,b,-s).reverse
>>
>> Could we have this in ndslice?
>
>
> Is `a[ _, 9, R(2, $, -3)]`
>
> equals to
>
> `a[0..$, 9, 2..$].reversed!2.strided!2(3)`
> or
> `a[0..$, 9, 2..$].strided!2(3).reversed!2`
> ?

My bad. You have already wrote `iota(a,b,-s).reverse`.

We can test this kind of syntax in Mir first https://github.com/DlangScience/mir
--Ilya

After more thought (since you have freedom of redesigning from scratch),
how about this:

https://docs.google.com/document/d/1cEf8AynZEZxlTENJx1i4w1GTB481bbc4iUbUeJT00-U/edit#heading=h.uxrd8sd74w8r



On Fri, Jan 8, 2016 at 11:00 PM, Ilya Yaroshenko via Digitalmars-d < digitalmars-d@puremagic.com> wrote:

> On Saturday, 9 January 2016 at 06:20:46 UTC, Ilya wrote:
>
>> On Saturday, 9 January 2016 at 00:26:42 UTC, Timothee Cour wrote:
>>
>>> i wrote my own tensor library a while ago and it allows the more convenient matlab/python+numpy like syntax:
>>>
>>> a[ _, 9, R(2, $, -3)]
>>> these are allowed:
>>> R() or _: full range for an index
>>> R(a,b): a..b
>>> R(a,b,s): when s>0, iota(a,b,s)
>>> R(a,b,s): when s<0, iota(a,b,-s).reverse
>>>
>>> Could we have this in ndslice?
>>>
>>
>>
>> Is `a[ _, 9, R(2, $, -3)]`
>>
>> equals to
>>
>> `a[0..$, 9, 2..$].reversed!2.strided!2(3)`
>> or
>> `a[0..$, 9, 2..$].strided!2(3).reversed!2`
>> ?
>>
>
> My bad. You have already wrote `iota(a,b,-s).reverse`.
>
> We can test this kind of syntax in Mir first
> https://github.com/DlangScience/mir
> --Ilya
>