I recently tried to update sage from version 4.6 or 4.5.something, I
forget which. When sage was rebuilding, however, I encountered the
compile failure described here:
http://trac.sagemath.org/sage_trac/ticket/9828#comment:2
This looks like an issue that was fixed in the past, what do I need to
d
how do I make the new copy the active one? That is, how do I make
"sage" in the command line refer to the new one?
Thanks
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I've been messing with my sage source. I've finally created the stuff
I want, but in the process have fiddled with other things. What's the
best way to create a clean, current library so that I can put just the
correct stuff in and make a patch?
Thanks,
Ethan
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Excellent, thanks
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Thanks,
I know that when I run the doctests it can work that way, but should I
be concerned about it failing later? Are all sage packages doctested
before a release? Will my stuff fail then?
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My code has doctests that look like this:
EXAMPLES:
::
sage: m = Riemann_Map([e^(I*t)],[I*e^(I*t)],0) #long time
(4 sec)
sage: points = m.get_theta_points()
sage: list_plot(points)
sage: s = spline(pts)
sage: s(3*pi/4)
Yet another question:
When I compile my class, I get something like this:
cdef class Riemann_Map:
cdef int N, B, ncorners
cdef f
cdef opp
cdef double complex a
cdef np.ndarray[float,ndim = 1] tester
^
-
Robert,
Is there any prediction for when numpy complex types will work?
(outside of the notebook, when compiling via sage -b)
Thanks,
Ethan
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Robert,
Should those double complex declarations give any speedup?
Are they declaring the numpy complex type or something else?
Slightly unrelated, how are self.something variables handled? It seems
like you can't cdef them, so are they then always going to be slow? If
you cdef a variable and t
I think it only works outside, when compiling extensions for sage.
However, I am also getting issues with complex types after the fix,
did you get them to compile regularly outside?
Ethan
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Apologies if this has already been addressed.
In list_plot, if I'm plotting points with "plotjoined = true", I need
to use the "thickness = x" argument, but if I use "plotjoined = false"
then I need to use "pointsize = x". Each argument is ignored and gives
a message in the wrong context. This is
Thank you, that worked beautifully.
Ethan
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Is it possible to change the version of Cython that sage -b runs? (it
uses 11.1, I need the complex support added in 11.2)
Alternately, is it possible to compile the stuff that needs that
version separately and then just stick it where it belongs?
Thanks,
Ethan
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Sorry to keep spamming sage-support.
I have a class instance m with a method riemann_map so that
m.riemann_map(z) returns a (numpy) complex value. I want to do a
complex_plot of that function. If I try:
complex_plot(m.riemann_map,(-2,2),(-2,2)) I get this error:
...
File "fast_eval.pyx", line 1
What is the "official" way to correctly divide 2 integer variables in
a %cython cell in a sage notebook? I know that in general you'd do
"from __future__ import division" but it looks like the notebook
doesn't like __future__ imports.
I have an simple workaround, so this isn't urgent, I'd just li
What do I import it as? if I try "import module my_stuff" (the folder
that I saved it in, and added to the package list) it tells me there's
no module of that name.
If I try "import my_stuff.interpolators" (The extension name and the
name of the .pyx file) it tells me the same thing.
Thanks,
Eth
Thank you, that did the trick. However, while everything compiles now,
I cant use my stuff in the notebook. I've run sage -b and I'm pretty
sure my module_list.py and setup.py entries are correct. Do I have to
import or include anything? Do my entries have to be in the proper
alphabetical order?
I want to include some of my cython code as a sage module. I followed
the directions for adding the .pyx file to the sage library at
http://www.sagemath.org/doc/developer/coding_in_other.html.
However, when I run "sage -b" I get this:
--
sag
When I run this code:
%cython
%time
import numpy as np
cimport numpy as np
COMPLEX = np.complex128
ctypedef np.complex128_t COMPLEX_t
it gives me this error:
"...code_sage30_spyx_0.pyx:10:9: 'complex128_t' is not a type
identifier"
As far as I can tell my code should work. At one point I thin
Ok, after messing around I discovered that I can solve my problem by
changing angle = abs((PI/corners[i][1])) to angle = np.complex(abs
((PI/corners[i][1])),0)
However, it seems like the first should work. Is this a known issue?
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In my program I have a section like this:
angle = abs((PI/corners[i][1]))
print angle, (z-corners[i][0])
tempz = (z-corners[i][0])**angle
The output reads like this:
2.00 0j
...
tempz = (z-corners[i][0])**angle
File "real_mpfr.pyx", line 2935, in
sage.rings.real_mpfr.RealNumber.
On Jul 7, 3:52 pm, William Stein wrote:
> On Tue, Jul 7, 2009 at 12:29 PM, Ethan Van Andel wrote:
>
> > I am running some image generation stuff over the sagenb server. They
> > can take a LONG time (2.5 hours or more). I find that often when I
> > check on the process
I am running some image generation stuff over the sagenb server. They
can take a LONG time (2.5 hours or more). I find that often when I
check on the process, it has been interupted with an error message
like this:
/home/sage/sage_install/sage/local/bin/sage-sage: line 349: 3500
Killed
python "$
When I show() a graphics object such as plot(x,-1,1), it plots it in
the desired range, but also adds a sort "buffer" around the image, the
axes extend beyond the region I told it to show, in the case of plot
(x) instead of [-1,1],[-1,1] its more like [-1.5,1.5]. This persists
if I specify the sho
Is there something I can do in sage so that when I show a plot (create
a png) it will automatically save it to a folder on my computer?
I can do it manually, but automatically would be nice.
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I'm trying to profile my code using "prun" like the tutorial says.
However, I can't get it to work. For example a command like this:
%prun plot(x,0,2)
gives this error:
Syntax Error:
%prun plot(x,0,2)
and this:
prun plot(x,0,2)
gives this error:
line 4
prun plot(x,_sage_const_0 ,_sage_con
Thanks for the help so far.
I've come a fair way and implemented a good portion in cython.
However, the speedup was only minor (< a factor of 2) and I suspect
I'm missing something. If anyone can give me any tips on how to
optimize the code, that would be most appreciated. Tips on the code
itself
I'm writing code for a cython module, but right now I'm doing it in
the sage worksheet for convenience. This means that I don't have
access to sage's arg(complex number) function. Therefore, I decided to
use the cmath module's "phase(x)" function which does the same thing.
When I import cmath, how
That worked beautifully, thanks for the fast response.
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Does sage have a way to use a numeric method (such as Jacobi, or Gauss-
Sidel) to solve matrix equations of the form A*x = b? (CDF matrices by
the way). the A.solve_right(b) method is too slow.
Thanks,
Ethan
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Apologies,
I changed my google search terms and immediately found an effective
algorithm. All is well.
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I think I've found the source code for that. However, It seems that it
is a bit too deep/complex for me to use it as an effective base.
Therefore, does anyone know a good way to find points on the interior
of a figure?
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I'm transferring some code to Cython to speed things up.
In my SAGE/python code, I have a function which takes as one of its
arguments, a function G.
I then declare a series of intermediate functions like this:
Gprime = derivative(G)
Hconj(t) = 1/(2*pi*i)*(Gprime(t)/abs(Gprime(t))/(a-G(t)
I want to evaluate a function on points in the interior of a
parametric function. Essentially what I'm trying to do is call
complex_plot on the interior of a figure. To do this, I need some way
to check whether a given point is in the figure, or simply generate a
good list of points that are in. W
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