Re: [sage-support] gsl in sage outside of notebook

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,

Re: [sage-support] complex parts

On 2011-9-14 23:35, Robert Bradshaw wrote: ... Otherwise, z.real, z.imag is probably going to be as fast as you can get, and there's no need to define a function, you could just write sage: a = complex(3,4) sage: x, y = a.real, a.imag For trivial cases, yeah, but consider

[sage-support] Re: complex parts

For trivial cases, yeah, but consider         parametric_plot((f(t-0.5j).real, f(t-0.5j).imag), (t,tmin,tmax))         parametric_plot(ReIm(f(t-0.5j)), (t,tmin,tmax)) -- For example: sage: f(z)=[z.real(),z.imag()] sage: t=var('t') sage: parametric_plot(f(exp(I*(t-5*I))),(t,0,2*pi))

[sage-support] Re: Asking whether a number is in QQ or not

b in QQ is (or should be) equivalent to QQ(b) not throwing an error. But if that fails, it only means that Sage can't convert it to a rational directly, it is perfectly possible that after a series of (computationally expensive) steps one could transform b into a rational. But if we would

[sage-support] Re: for loop in 3d image

A colon is missing after range(20). The following version works for me: (but the indentation in this post may be broken) x,y,z,t = var('x,y,z,t') P = implicit_plot3d(x^2 +y^2 -z^2 ==1, (x,-3.2,3.2),(y,-3.2,3.2), (z,-3,3),opacity=.2,color='blue') for k in range(20): P +=

Re: [sage-support] gsl in sage outside of notebook

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

[sage-support] Re: Bug in pari/gp or sage? Any fixes?

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 On Sep 13, 9:49 am, vasu tewari.v...@gmail.com wrote: Hi Thanks for the reply. I am also using

[sage-support] loading a series of files inside a loop

Hi all, I'm new to this group; thanks for having me. I have generated a large number of text files (several lots of 81 files) with the intention of reading them back into another sage program (via the command line). The text filenames were generated by the line

[sage-support] Re: Asking whether a number is in QQ or not

Hi Volker, On 15 Sep., 11:45, Volker Braun vbraun.n...@gmail.com wrote: b in QQ is (or should be) equivalent to QQ(b) not throwing an error. No, that's incorrect. It should be (and is) equivalent to QQ(b)==b returning True. QQ(b) is just a conversion. You can convert any element of a finite

[sage-support] Re: plot3d with adaptive=True fails

On Sep 15, 9:08 am, Dan Drake dr...@kaist.edu wrote: This is strange: x, y =var('x y') plot3d(sqrt(x^2+y^2)*sin(1/sqrt(x^2+y^2)), (x,-1/2, 1/2), (y, -1/2, 1/2), adaptive=True) fails with ValueError: cannot convert float NaN to integer. Something goes wrong when it partitions up the

Re: [sage-support] Re: plot3d with adaptive=True fails

On Thu, Sep 15, 2011 at 7:10 PM, kcrisman kcris...@gmail.com wrote: On Sep 15, 9:08 am, Dan Drake dr...@kaist.edu wrote: This is strange: x, y =var('x y') plot3d(sqrt(x^2+y^2)*sin(1/sqrt(x^2+y^2)), (x,-1/2, 1/2), (y, -1/2, 1/2), adaptive=True) fails with ValueError: cannot convert float

[sage-support] Re: plot3d with adaptive=True fails

Also: sage: T = Cylindrical('height', ['radius', 'azimuth']) sage: r, theta, z = var('r theta z') sage: plot3d(r*sin(1/r), (r, 0.0, 0.2), (theta, 0, 2*pi), transformation=T,adaptive=True) Andrzej Chrzeszczyk -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe

[sage-support] [ANN} OpenOpt, FuncDesigner, DerApproximator, SpaceFuncs release 0.36

Hi all, new release of our free soft (OpenOpt, FuncDesigner, DerApproximator, SpaceFuncs) v. 0.36 is out: OpenOpt: Now solver interalg can handle all types of constraints and integration problems Some minor improvements and code cleanup FuncDesigner: Interval analysis now can

[sage-support] Re: Asking whether a number is in QQ or not

PS: sage: cm.explain(QQ, b.parent()) I forgot to copy-and-paste the definition of cm. It was: sage: from sage.structure.element import get_coercion_model sage: cm = get_coercion_model() Cheers, Simon -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe

Re: [sage-support] Re: plot3d with adaptive=True fails

On Thu, 15 Sep 2011 at 06:40AM -0700, kcrisman wrote: On Sep 15, 9:08 am, Dan Drake dr...@kaist.edu wrote: This is strange: x, y =var('x y') plot3d(sqrt(x^2+y^2)*sin(1/sqrt(x^2+y^2)), (x,-1/2, 1/2), (y, -1/2, 1/2), adaptive=True) fails with ValueError: cannot convert float NaN to

[sage-support] Re: Asking whether a number is in QQ or not

Thank you to all of you! On Sep 15, 12:59 pm, Simon King simon.k...@uni-jena.de wrote: PS:    sage: cm.explain(QQ, b.parent()) I forgot to copy-and-paste the definition of cm. It was:   sage: from sage.structure.element import get_coercion_model   sage: cm = get_coercion_model()