Hi Stephan,
On 18 February 2012 06:43, Stefan Kohl <ste...@mcs.st-and.ac.uk> wrote:
> Dear Forum,
>
> Rohit Gupta asked:
>
>> One of the exercises ( um, by Stephen Kohl I think ) gives the following
>> solution for drawing an Ulam spiral of primes. I am not sure whether the
>>
>> "SaveAsBitmapPicture"
>> function requires a special package. Does it?
>
> And Dmitrii Pasechnik answered:
>
>> this needs RCWA package installed and loaded.
>
> Only this is true.
>
>> And it in turn needs a slew of other packages, such as anluth, which
>> in turn needs Kant, and the latter is not even possible to install on some
>> systems...
>
> However this statement is plainly wrong -- the RCWA package is part of
> the standard GAP distribution (thus if you have GAP you also have RCWA),
> and it can be loaded and used without any problems, under any operating
> system for which GAP is available. -- Just enter "LoadPackage("rcwa");".
> Possible warnings from other packages (non-compiled binaries etc.) can
> savely be ignored, as they have no influence on the functionality of RCWA.
RCWA requires Polycyclic, according to its readme.
README of Polycyclic says:
To have the full functionality of the package available you need the
GAP 4 package Alnuth and the Computer Algebra System Kant installed.
Its init.g has the line
RequirePackage("alnuth");
In turn, Alnuth 2.3.1 *appears* to require KASH.
KASH is not available on MacOSX 10.6.
This was my line of thought when I tried to see why it doesn't work on
my laptop.
However, it turned out that the installation of Alnuth was broken (I
tried using Alnuth 3 :))
After getting the good old Alnuth 2.3.1, it worked.
Sorry for noise,
Dima
>
> If you experience something else, then please let me know!
>
> Best wishes,
>
> Stefan Kohl
>
>
>
>
>
>
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