As a follow-up, anonymous recursive functions in Axiom are described at:
https://rosettacode.org/wiki/Anonymous_recursion#Axiom
For the example:
lab1method2(x: D, a: D, n: N): Float ==
zero? n => a.1
n = 1 => a.2
n = 2 => a.3
c := vect
On Fri, Oct 30, 2020 at 06:10:25PM +0100, Ralf Hemmecke wrote:
>
> A. Obviously the SPAD compiler is unable to deal with recursive
> local functions. :-(
Yes, this is current limitation.
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Yes, indeed, in the end I converted the DirectProduct to Vector (with
an extra variable) before entering the loop. The code is here:
https://github.com/nsajko/discrete-math-lab1
Thanks, everyone.
Neven
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Yes, this "immutability" seems sometime difficult to accept, but since
it is easy to convert back and forth to Vector and use setelt! from
there, it's not a big deal. Perhaps it it sometimes costs more copying
than you wish to have.
Ralf
On 10/31/20 3:00 PM, Bill Page wrote:
> The elements of Dir
The elements of DirectProduct are intended to be immutable
mathematical values, i.e a "tuple" in a n-tuple product, not a data
container.
On Sat, Oct 31, 2020 at 9:29 AM Neven Sajko wrote:
>
> Thank you for your insight, Bill.
>
> Does somebody know why does DirectProduct not have setelt! and qse
Thank you for your insight, Bill.
Does somebody know why does DirectProduct not have setelt! and qsetelt! ?
Thanks,
Neven
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Two problems: First, unlike the interpreter, SPAD does not have
multiple assignment. The error message about "compColon" is the
compiler's poor way of trying to say that. Secondly, the DirectProduct
domain does not have a direction coercion from (...) tuple, List or
other similar domain. You need t
That's a nasty error that I cannot resolve without seeing the code.
Usually when I get this, it is an identation problem in the code.
Ralf
On 10/30/20 6:28 PM, Neven Sajko wrote:
> Hmm, I tried to implement lab1method2 with iteration with a for loop
> instead of with recursion, but now Fricas tel
Hmm, I tried to implement lab1method2 with iteration with a for loop
instead of with recursion, but now Fricas tells me this:
Internal Error
Unexpected error in call to system function compColon
The package is again attached.
Thank you,
Neven
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On 10/30/20 4:41 PM, Neven Sajko wrote:
> Thank you very much for your thoughtful responses, Ralf, I understand
> Spad a bit better now thanks to you. However it seems that another
> roadblock has appeared: while your lab1method1 works fine, lab1method2
> does not. At the end of the compilation the
Thank you very much for your thoughtful responses, Ralf, I understand
Spad a bit better now thanks to you. However it seems that another
roadblock has appeared: while your lab1method1 works fine, lab1method2
does not. At the end of the compilation there are warnings about the
function BOOT::|DMLAB1
Hi Neven,
thank you. You hit another problem that is not clearly enough described
in the book. When I started with AXIOM, it took some time until I
understood, that not everything that works in the interpreter also works
for the compiler. You have hit such a case here. Another thing that
should go
Hello,
I am getting the following error with the attached Spad code, in the
implementation of lab1method1 while trying to create a matrix of Float
values:
Apparent user error: Cannot coerce i of mode (NonNegativeInteger) to
mode (Fraction (Integer))
I don't know how to proceed. It seems as if th
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