Re: [sage-support] gsl in sage outside of notebook
On Thu, Sep 15, 2011 at 3:24 PM, Rajeev Singh rajs2...@gmail.com wrote:
On Thu, Sep 15, 2011 at 12:07 PM, Robert Bradshaw
rober...@math.washington.edu wrote:
On Wed, Sep 14, 2011 at 2:31 AM, Rajeev Singh rajs2...@gmail.com wrote:
Hi,
The following examples compiles from the notebook
%cython
cimport sage.gsl.ode
import sage.gsl.ode
include 'gsl.pxi'
cdef class van_der_pol(sage.gsl.ode.ode_system):
cdef double beta
def __cinit__(self, double beta=1.0):
self.beta = beta
cdef int c_f(self,double t, double *y,double *dydt):
dydt[0]=y[1]
dydt[1]=-y[0]-self.beta*y[1]*(y[0]*y[0]-1)
return GSL_SUCCESS
cdef int c_j(self, double t,double *y,double *dfdy,double *dfdt):
dfdy[0]=0
dfdy[1]=1.0
dfdy[2]=-2.0*10*y[0]*y[1]-1.0
dfdy[3]=-10*(y[0]*y[0]-1.0)
dfdt[0]=0
dfdt[1]=0
return GSL_SUCCESS
However if I put it in a file vander.pyx (say) and use the following
setup.py -
from distutils.core import setup
from distutils.extension import Extension
from Cython.Distutils import build_ext
ext = Extension(vander, [vander.pyx],
include_dirs = ['/home/rajeev/bin/sage/devel/sage-main/sage/gsl/'])
setup(ext_modules=[ext],
cmdclass = {'build_ext': build_ext})
I get the following error -
cdef class van_der_pol(sage.gsl.ode.ode_system):
^
vander.pyx:10:5: 'ode_system' is not declared
I guess the problem is with the setup.py. Can someone tell me how to do
this?
IIRC, the notebook %cython creates a setup.py--you could just look at
that. Chances are your Extension object is missing include dirs and
libraries.
-Robert
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Hi,
The present script takes a pyx file as input and outputs a c, o and so
file in the same directory. The so can now be imported in a sage
program. I have already checked it and its seems to be working fine. I
did look at the commands generated by setup.py file to write this
script.
Rajeev
Hi,
There is a better (safer I guess) way of doing the task using
something called cython_create_local_so. The following command will do
the job -
sage -c from sage.all import cython_create_local_so;
cython_create_local_so('_laplace.pyx')
Rajeev
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[sage-support] How to write Sage code to cython code
Hi all, I want to use cython. The following code does not work %cython cdef P P = next_prime(ZZ.random_element(2^(100-1),2^100)) -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] How to write Sage code to cython code
On Sat, Sep 17, 2011 at 5:46 PM, Santanu Sarkar sarkar.santanu@gmail.com wrote: Hi all, I want to use cython. The following code does not work %cython cdef P P = next_prime(ZZ.random_element(2^(100-1),2^100)) -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org Try this - %cython from sage.all import * cdef P P = next_prime(ZZ.random_element(2^(100-1),2^100)) print P Rajeev -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] How to write Sage code to cython code
It always returns 101, not a random prime of 100 bit integer. On 17 September 2011 18:04, Rajeev Singh rajs2...@gmail.com wrote: On Sat, Sep 17, 2011 at 5:46 PM, Santanu Sarkar sarkar.santanu@gmail.com wrote: Hi all, I want to use cython. The following code does not work %cython cdef P P = next_prime(ZZ.random_element(2^(100-1),2^100)) -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org Try this - %cython from sage.all import * cdef P P = next_prime(ZZ.random_element(2^(100-1),2^100)) print P Rajeev -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] How to write Sage code to cython code
It always returns 101, not a random prime of 100 bit integer. That's because in Python/Cython, the carat ^ isn't exponentiation, it's bitwise xor. The most general solution is to use **: Python 2.7.2 (v2.7.2:8527427914a2, Jun 11 2011, 15:22:34) [GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin Type help, copyright, credits or license for more information. 2^(100-1) 97 2^(100) 102 2**(100-1) 633825300114114700748351602688L 2**(100) 1267650600228229401496703205376L Doug -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] How to write Sage code to cython code
Thank you. Is there any function in Python for inverse modulo of an integer? Corresponding Sage function is A=15.inverse_mod(17). Also is there any function like ''.join(str(i) for i in A) in Python for an array A? On 17 September 2011 19:36, D. S. McNeil dsm...@gmail.com wrote: It always returns 101, not a random prime of 100 bit integer. That's because in Python/Cython, the carat ^ isn't exponentiation, it's bitwise xor. The most general solution is to use **: Python 2.7.2 (v2.7.2:8527427914a2, Jun 11 2011, 15:22:34) [GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin Type help, copyright, credits or license for more information. 2^(100-1) 97 2^(100) 102 2**(100-1) 633825300114114700748351602688L 2**(100) 1267650600228229401496703205376L Doug -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] which system is called ?
For a small introduction to Sage, I want to show what is really called,
for a set of problems, depending on, say, the field we use:
Example:
from sage.misc.citation import get_systems
A=Matrix(RDF,[[1,3,2],[1,4,2],[0,5,2]])
B=vector(RDF,[1,2,3])
get_systems ('A.solve_left(B)')
['numpy', 'scipy']
okay!
but:
get_systems ('A\B')
[]
Why ? we do not use the LU factorization of numpy in the second case?
Other example:
A=Matrix(QQ,[[1,3,2],[1,4,2],[0,5,2]])
B=vector(QQ,[1,2,3])
get_systems ('A.solve_left(B)')
[]
It seems that linbox would be the good tool.
Is it because get_systems do not give the good answer? In that case, how
to make a trace of what is really called?
Yours
t.d.
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attachment: tdumont.vcf
[sage-support] Re: Bug in pari/gp or sage? Any fixes?
Hi Thanks for your response. Here is the issue I am facing right now. I am running this particular piece of code on sage which basically runs the command t=gp.thueinit(f(x),1); m=gp.thue(t,1) for a number of cubic polynomials f(x). It turns out this works fine for most polynomials. I would like to know which ones are the ones for which the code above fails. I tried running my program on an older version of pari, even though there were bugs reported in that too, the number of bugs was definitely less. So this is definitely an issue with pari/gp too. But any pointers on how to figure out what polynomials this fails for are welcome. And is it possible to run sage 4.7.1 with an older version of Pari/gp? To answer your question, I am using VMWare on Windows to run sage. Thanks Amir On Sep 16, 1:06 am, luisfe lftab...@yahoo.es wrote: On Sep 15, 12:43 pm, Amir amirg...@gmail.com wrote: Hi I have the same problem. I am using sage 4.6 installed on windows vista. This is part of code I have written in sage. Is there anyway I can catch this error and make an exception? Thanks An exception is not the way to dela with this error. We need gp to work without problems. Do you use the VirtualBox image to deal get this problem? I will try to reproduce it. -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
