I need to use a fast random (complex) number generatot.
The following :
sage: %%cython
: from sage.misc.prandom import random
: cpdef complex crand(double x):
: return x*random()+x*1j*random()
is about 77 times faster than its Python equivalent :
sage: def prand(x):
: r
On 2016-10-17 09:53, Emmanuel Charpentier wrote:
I need to use a fast random (complex) number generatot.
The following :
sage: %%cython
: from sage.misc.prandom import random
: cpdef complex crand(double x):
: return x*random()+x*1j*random()
is about 77 times faster than its P
Dear Jeroen,
Le lundi 17 octobre 2016 09:58:38 UTC+2, Jeroen Demeyer a écrit :
>
> On 2016-10-17 09:53, Emmanuel Charpentier wrote:
> > I need to use a fast random (complex) number generatot.
> >
> > The following :
> >
> > sage: %%cython
> > : from sage.misc.prandom import random
> > .
CDF is the name of a Python variable not a type.
sage: a = CDF.an_element()
sage: type(a)
You need to use this ComplexDoubleElement to type your function.
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Thank you Vincent. this is much clearer.
It seems that I have some things left to understand about the Sage class
and types hierarchies. Sorry for the noise...
--
Emmanuel Charpentier
Le lundi 17 octobre 2016 13:55:14 UTC+2, vdelecroix a écrit :
>
> CDF is the name of a Python variable not a ty
On 2016-10-17 15:10, Emmanuel Charpentier wrote:
Thank you Vincent. this is much clearer.
It seems that I have some things left to understand about the Sage class
and types hierarchies.
There is a difference between a type and a parent.
A parent is a mathematical object. It is the mathematica
I think I already understood this distinction between type and parent. What
was not clear (and still is not, but I have homework to do about this
before making new noise on the list...) is how this translates in terms of
(Python) programming.
Provisorily, I conclude :
- type : look for some
After downloading the .dmg file and dragging it to my Applications folder,
I go to it's location via terminal:
cd /Applications/SageMath
Then, when I try to run sage:
./sage
I get this error message
ERROR: The Sage installation tree has moved
from
/Users/buildslave-sage/slave/binary_pkg/b
I did drag the SageMath file, not the .dmg - sorry, I was unclear.
On Monday, October 17, 2016 at 3:16:21 PM UTC+1, Jack Foster wrote:
>
> After downloading the .dmg file and dragging it to my Applications folder,
> I go to it's location via terminal:
>
> cd /Applications/SageMath
>
> Then, when
It seems that you used the wrong procedure. As mentioned in the error
message that you copied
1. Open the .tar.bz2 archive (or .dmg on OSX)
2. Move the SageMath folder/app to where you want it to be. You can
also rename the directory now.
The step 2 is *not* about moving the dmg file but only
I did drag the SageMath file, not the .dmg - sorry, I was unclear.
On Monday, October 17, 2016 at 3:21:12 PM UTC+1, vdelecroix wrote:
>
> It seems that you used the wrong procedure. As mentioned in the error
> message that you copied
>
> 1. Open the .tar.bz2 archive (or .dmg on OSX)
>
> 2. Move
By "it" I meant the SageMath file, not the .dmg - sorry, I was unclear. I
followed the instructions exactly but it won't work.
On Monday, October 17, 2016 at 3:21:12 PM UTC+1, vdelecroix wrote:
>
> It seems that you used the wrong procedure. As mentioned in the error
> message that you copied
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