Than you Elijah, that second example is exactly what I want!
> On 9 Mar 2022, at 05:59, Elijah Stone <elro...@elronnd.net> wrote:
>
> Something like this, perhaps?
>
> ]a=. i.5 5
> 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
> ]b=. 2 2 $ 100 200 300 400
> 100 200
> 300 400
> b (<1 2;0 1)} a
> 0 1 2 3 4
> 100 200 7 8 9
> 300 400 12 13 14
> 15 16 17 18 19
> 20 21 22 23 24
>
> Note this requires you to specify the entire perimeter of b. Here's a
> version which abstracts that logic, specifying only the coordinate of the
> upper-left corner:
>
> am=. {{ x (<m <@(+i.)"0 $x)} y }}
> b 2 2 am a
> 0 1 2 3 4
> 5 6 7 8 9
> 10 11 100 200 14
> 15 16 300 400 19
> 20 21 22 23 24
>
> This will also work for higher-rank a and b.
>
> -E
>
>> On Wed, 9 Mar 2022, Richard Donovan wrote:
>>
>> Can I amend an array with a smaller array? For example amend a 5x5 array by
>> a 2x2 array starting at location x,y within the larger array?
>>
>> Thanks
>>
>> Richard Donovan
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