Use 180548043269214573494164592263168x if you want that sequence of
digits to be treated as an extended precision number.
Omitting the x would result in the use of fixed with (64 bit) storage,
which will lose precision.
--
Raul
On Fri, Aug 11, 2023 at 2:44 PM Ak O <akin...@gmail.com> wrote:
>
> Hi everybody, I hope you are all well.
>
> I have a question about the Anagram ( A. ) operator.
>
> In a defined function, how do I designate that an input 'x' is treatment
> as extended datatype rather than float?
>
> Where being defined:
> 13 : ' x A. i.y'
> [ A. [: i. ]
>
> is to be taken as,
> 13 : 'X_INPUTx A. y' NB. 12345672345467x A. i.y
>
> How do I get the affect of catenating an 'x' to the end of a number in a
> defined function?
>
> If you understand my question ignore below, otherwise I give an example.
>
> Thank you for your thoughts.
>
> Ak
>
>
> My understanding of the Anagram operator (A.).
> The vocabulary reference page (acapdot) gives the product of the Anagram
> index function
> A. y
> as datatype extended.
>
>
> The Anagram function
> x A. y
> applies the permutation map (x) on ordered vector sequence (y) as below.
>
>
> ] vector_sequence =: ?~30
> 20 12 4 29 7 17 22 11 2 27 28 23 6 21 9 3 24 10 26 13 15 1 18 8 25 19 0 5
> 16 14
>
>
> ] vector_anagram =: A. vector_sequence
> 180548043269214561950911457875657
>
> The Noun, vector_anagram will have datatype extended, given by:
> datatype vector_anagram
> extended
>
> Applying the vector_anagram on a vector using the command:
> vector_anagram A. i.30
> 20 12 4 29 7 17 22 11 2 27 28 23 6 21 9 3 24 10 26 13 15 1 18 8 25 19 0 5
> 16 14
>
> The expected result.
>
> In a case where the digits are input on there own, the following fails with
> 'domain error, executing dyad A.'
>
> 180548043269214561950911457875657 A. i.30
>
> One approach is to place 'x:' before the input.
> ( x:180548043269214561950911457875657 )A. i.30
> 20 12 4 29 7 17 22 11 2 27 28 25 1 8 0 15 16 14 3 5 19 26 18 6 21 23 13 24
> 9 10
>
> This is not the expected result.
>
> The input is treated as 180548043269214573494164592263168.
>
> ( x:180548043269214561950911457875657 )
> 180548043269214573494164592263168
>
> Not the input I thought I was applying.
>
> An alternative is to postfix an 'x' to the end of the input.
> 180548043269214561950911457875657x A. i.30
> 20 12 4 29 7 17 22 11 2 27 28 23 6 21 9 3 24 10 26 13 15 1 18 8 25 19 0 5
> 16 14
>
> The expected result. But how do I achieve this for a defined function.
>
> Does not work either.
> ".@((":vector_anagram),x')"_ NB. same as x:
>
>
> Maybe there is a symbol that 13 : can be recognize to trigger the extended
> datatype.
>
>
>
> Thank you for your help.
>
> Ak
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