[sage-support] Re: Help-- bound a 3D plot
Could you be more specific? When I do something like sage: u,v=var(u,v) sage: parametric_plot3d((cos(u), sin(u) + cos(v), sin(v)), (u, 0, 2*pi), (v, -pi, pi), color='green', opacity=0.1, plot_points=[30,30]) I think get the [x,y,z] limits on the framed axes, which seems to be what you are saying you want. On Thu, Jul 17, 2008 at 8:34 PM, Rose [EMAIL PROTECTED] wrote: Hi, I asked this question 3 days ago, but got no answer. This problem hinder me in my project. I would appreciate an answer, even if what I want to do is impossible. On 14 juil, 10:37, Rose [EMAIL PROTECTED] wrote: Hi, I am drawing some parametric_plot3d, but when I display them, I would prefer to see the result in a box centered at the origin of side of length 4 instead of all my plot, because the plot can be too large. In other words, I want to bound the Cartesian coordinates [x,y,z] of the plot, and not the parametric space. Is there a way to do that? Rose Rose --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: raw picture manipulation
On Jul 17, 8:40 pm, David Joyner [EMAIL PROTECTED] wrote: I would try sage: im.show(command=/opt/local/bin/xv) based on what you say below. Does this help? Unfortunately not, im.show(command=/opt/local/bin/xv) and im.show(command=/opt/local/ bin/display) both still result in the same traceback, Traceback (click to the left for traceback) ... IOError: decoder jpeg not available JM --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] firefox crash
Hi- I'm trying to get started, sorry in advance if I'm just doing something dumb. I installed SAGE 3.0.3 on my Mac OS X (intel) 10.5.4. and am using Firefox 2.0.0.16. If I type notebook() or inotebook() at the sage prompt, I see the sage admin page in my browser and it looks fine. When I click on new worksheet then Firefox immediately dies with no error message in the console. Ctl-c will return the sage console to the prompt. I tried turning popup blocking off. Is there a browser setting that I need to check? Is there some other thing that may be the culprit? This looks cool, can't wait to check it out for real. Thanks, Rob Braswell University of New Hampshire --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: firefox crash
On Fri, Jul 18, 2008 at 4:30 PM, rob.braswell [EMAIL PROTECTED] wrote: Hi- I'm trying to get started, sorry in advance if I'm just doing something dumb. I installed SAGE 3.0.3 on my Mac OS X (intel) 10.5.4. and am using Firefox 2.0.0.16. If I type notebook() or inotebook() at the sage prompt, I see the sage admin page in my browser and it looks fine. When I click on new worksheet then Firefox immediately dies with no error message in the console. Ctl-c will return the sage console to the prompt. I tried turning popup blocking off. Is there a browser setting that I need to check? Is there some other thing that may be the culprit? Maybe you should install Firefox 3.0? This looks cool, can't wait to check it out for real. You could use Sage with Safari. Just open Safari to the same url -- probably http://localhost:8000 William --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Help-- bound a 3D plot
On Jul 18, 12:37 am, William Stein [EMAIL PROTECTED] wrote:
On Fri, Jul 18, 2008 at 3:04 AM, David Joyner [EMAIL PROTECTED] wrote:
Could you be more specific? When I do something like
sage: u,v=var(u,v)
sage: parametric_plot3d((cos(u), sin(u) + cos(v), sin(v)), (u, 0,
2*pi), (v, -pi, pi), color='green', opacity=0.1, plot_points=[30,30])
I think get the [x,y,z] limits on the framed axes, which seems to be
what you are saying
you want.
I think what I want to do is not to bound but to clip the plot to a
specific (3D) window, smaller than the entire plot.
Yes, Rose, could you be more specific? E.g., give a particular
example of code that draws a 3d plot,
For exemple:
t1, t2 = var('t1,t2')
r=1/sqrt(2)
w=r*cos(t2)
fx=sqrt(1-r^2)*sin(t1)/(w+1)
fy=sqrt(1-r^2)*cos(t1)/(w+1)
fz=r*sin(t2)/(w+1)
A=parametric_plot3d([fx,fy,fz], (t1,0,2*pi), (t2,0,2*pi),
rgbcolor=(0,0,1), opacity=0.4)
r, t2 = var('r,t2')
t1=0
w=sqrt(1-r^2)*cos(t2)
fx=r*sin(t1)/(w+1)
fy=r*cos(t1)/(w+1)
fz=sqrt(1-r^2)*sin(t2)/(w+1)
B=parametric_plot3d([fx,fy,fz], (r,0.001,1/sqrt(2)), (t2,0,2*pi),
color=hue(0), opacity=0.8)
(A+B).show()
and what you *wish*
it would draw instead.
I would like to clip this in a box of side of length 4. I want the
torus to be in the center of the image even if I lose a part of the
other object.
Rose
--~--~-~--~~~---~--~~
To post to this group, send email to sage-support@googlegroups.com
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/sage-support
URLs: http://www.sagemath.org
-~--~~~~--~~--~--~---
[sage-support] about functions evaluation
Hi, I have no experience in sage, I began to use it two days ago because I need arbitrary precision arithmetic and Octave is not so god for that. I wanted to write a script where I evaluate a function which is also written in a script. this can be done in Octave , f. ex. by using feval, but I have not found anything similar in sage. could anybody give some suggestion? thanks in advance, Aniura --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] System of (linear) equations with values in a specific ring/field.
I'd like to solve some systems of linear equation with coefficients and unknown in the integers modulo Z_n. I'm aware of solve_mod, but: 1. it's slow; 2. returns a list of solutions and not a list of generators/relations for the solutions. Is there anything better suited for me? Thanks, Stefano Maggiolo --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: about functions evaluation
On Jul 18, 2008, at 12:04 , aniura wrote: I have no experience in sage, I began to use it two days ago because I need arbitrary precision arithmetic and Octave is not so god for that. There are a number of good Python tutorials and other doc available. Check the site http://www.python.org (I can't tell whether you have Python experience; Python is the implementation language for most of Sage). I wanted to write a script where I evaluate a function which is also written in a script. this can be done in Octave , f. ex. by using feval, but I have not found anything similar in sage. could anybody give some suggestion? I'm not sure what you want from your description. However: sage: def foo(x): ...: return bar(x) ...: sage: def bar(y): : return y*y : sage: foo(10) 100 Is this what you mean? 'foo' and 'bar' can be defined in different files, as long as you have both files loaded when you call foo(). You can also pass functions as arguments: sage: def foo(x, f): : return f(x) : sage: def bar(y): : return y*y : sage: foo(10, bar) 100 Does this help? If not, please clarify; we're happy to help. Justin -- They said it couldn't be done, but sometimes, it doesn't work out that way. - Casey Stengel -- --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: about functions evaluation
On Jul 18, 9:04 pm, aniura [EMAIL PROTECTED] wrote: feval,... import filename (without .py) and now filename.function() calles it (there is also from filename import * (or list of function names)) harald --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: about functions evaluation
I wanted to pass functions as arguments, so your example solved my problem, thank you! On Jul 18, 5:52 pm, Justin C. Walker [EMAIL PROTECTED] wrote: On Jul 18, 2008, at 12:04 , aniura wrote: I have no experience in sage, I began to use it two days ago because I need arbitrary precision arithmetic and Octave is not so god for that. There are a number of good Python tutorials and other doc available. Check the site http://www.python.org (I can't tell whether you have Python experience; Python is the implementation language for most of Sage). I wanted to write a script where I evaluate a function which is also written in a script. this can be done in Octave , f. ex. by using feval, but I have not found anything similar in sage. could anybody give some suggestion? I'm not sure what you want from your description. However: sage: def foo(x): ...: return bar(x) ...: sage: def bar(y): : return y*y : sage: foo(10) 100 Is this what you mean? 'foo' and 'bar' can be defined in different files, as long as you have both files loaded when you call foo(). You can also pass functions as arguments: sage: def foo(x, f): : return f(x) : sage: def bar(y): : return y*y : sage: foo(10, bar) 100 Does this help? If not, please clarify; we're happy to help. Justin -- They said it couldn't be done, but sometimes, it doesn't work out that way. - Casey Stengel -- --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Help-- bound a 3D plot
On Fri, Jul 18, 2008 at 6:01 PM, Rose [EMAIL PROTECTED] wrote:
On Jul 18, 12:37 am, William Stein [EMAIL PROTECTED] wrote:
On Fri, Jul 18, 2008 at 3:04 AM, David Joyner [EMAIL PROTECTED] wrote:
Could you be more specific? When I do something like
sage: u,v=var(u,v)
sage: parametric_plot3d((cos(u), sin(u) + cos(v), sin(v)), (u, 0,
2*pi), (v, -pi, pi), color='green', opacity=0.1, plot_points=[30,30])
I think get the [x,y,z] limits on the framed axes, which seems to be
what you are saying
you want.
I think what I want to do is not to bound but to clip the plot to a
specific (3D) window, smaller than the entire plot.
Yes, Rose, could you be more specific? E.g., give a particular
example of code that draws a 3d plot,
For exemple:
t1, t2 = var('t1,t2')
r=1/sqrt(2)
w=r*cos(t2)
fx=sqrt(1-r^2)*sin(t1)/(w+1)
fy=sqrt(1-r^2)*cos(t1)/(w+1)
fz=r*sin(t2)/(w+1)
A=parametric_plot3d([fx,fy,fz], (t1,0,2*pi), (t2,0,2*pi),
rgbcolor=(0,0,1), opacity=0.4)
r, t2 = var('r,t2')
t1=0
w=sqrt(1-r^2)*cos(t2)
fx=r*sin(t1)/(w+1)
fy=r*cos(t1)/(w+1)
fz=sqrt(1-r^2)*sin(t2)/(w+1)
B=parametric_plot3d([fx,fy,fz], (r,0.001,1/sqrt(2)), (t2,0,2*pi),
color=hue(0), opacity=0.8)
(A+B).show()
and what you *wish*
it would draw instead.
I would like to clip this in a box of side of length 4. I want the
torus to be in the center of the image even if I lose a part of the
other object.
Rose
Amazingly, it looks like we never implemented this capability.
Moreover, I don't see an easy way to do it, though maybe carefully
reading the jmol scripting language docs (which sage uses):
http://jmol.sourceforge.net/
would yield a command for clipping a scene. If so, then I bet
we could very easily add this functionality to Sage.
Robert Bradshaw -- any thoughts?
-- William
--~--~-~--~~~---~--~~
To post to this group, send email to sage-support@googlegroups.com
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/sage-support
URLs: http://www.sagemath.org
-~--~~~~--~~--~--~---
[sage-support] Re: System of (linear) equations with values in a specific ring/field.
On Jul 18, 2008, at 1:05 PM, Stefano Maggiolo wrote: I'd like to solve some systems of linear equation with coefficients and unknown in the integers modulo Z_n. I'm aware of solve_mod, but: 1. it's slow; 2. returns a list of solutions and not a list of generators/relations for the solutions. Is there anything better suited for me? Yes, there's certainly faster ways about going about this, though they might take a bit more work. I'm not sure what the equations you're trying to solve look like, but I would try using linear algebra over Z_p for each p dividing n, and then use Chinese Remainder and Hensel lifting. to lift to solutions mod n. For example, to solve the following mod 1147 = 31*37 5x + y = 1 x + 4y = 2 sage: M = matrix(2, 2, [5,1,1,4]); M [5 1] [1 4] sage: M.change_ring(GF(31)) \ vector([1,2]) (5, 7) sage: M.change_ring(GF(37)) \ vector([1,2]) (4, 18) sage: crt(5, 4, 31, 37) % 1147 966 sage: crt(7, 18, 31, 37) % 1147 906 gives the solution x=996, y=906. If M were singular for any of the divisors of your n, then you would get a lift of each solution. - Robert --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Fractional powers for polynomial variables
Hello, I need to substitute some variable in a polynomial ring with a fractional power of another one. I know that the result still will be a polynomial, however I have discovered the following behaviour (v. 3.0.5 on sage.math): sage: pr = PolynomialRing(QQ, u,v) sage: pr.injvar() Defining u, v sage: u^(1/2) 1 sage: pr = PolynomialRing(QQ, w) sage: pr.injvar() Defining w sage: w^(1/2) --- TypeError Traceback (most recent call last) /home/novoselt/ipython console in module() /home/novoselt/polynomial_element.pyx in sage.rings.polynomial.polynomial_element.Polynomial.__pow__ (sage/ rings/polynomial/polynomial_element.c:8179)() /home/novoselt/element.pyx in sage.structure.element.RingElement.__mul__ (sage/structure/element.c: 8814)() /home/novoselt/coerce.pyx in sage.structure.coerce.CoercionModel_cache_maps.bin_op_c (sage/ structure/coerce.c:5582)() TypeError: unsupported operand parent(s) for '*': 'type 'list'' and 'Rational Field' sage: sqrt(w) sqrt(w) Is it how things were supposed to work for some reason or a bug? Thank you, Andrey --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] hyper-v-sage-deluxe-3.0.5
Hello all, I have uploaded a 64-bit Hyper-V image of SAGE 3.0.5 built from source running on (X)Ubuntu 8.0.4 Server LTS, patched as of 7/15/2008. Hyper-V requires 64-bit Windows 2008 (any version) running on a processor with the AMD/Pacifica or Intel VT hardware virtualization support. It's 75% smaller than the vmware-sage-deluxe image, and (IMHO) runs better. I haven't had time to put instructions on how to use it, but it uses the same login/password combo as the VMWare version of SAGE, and requires the (free) 7-Zip tool to extract it. It can be found here: http://sage.math.washington.edu/home/acgetchell/ Let me know if you run into any problems, and I'll see what I can do. Enjoy! Adam -- Invincibility is in oneself, vulnerability in the opponent. -- Sun Tzu --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Normalizing symbolic polynomial
Hello, I have a symbolic expression which is a polynomial in t and t^(-1). I want to multiply it by some power of t so that it is a polynomial of t. How can I determine this power? Coefficients are some symbolic expressions in other variables, e.g. sqrt(a)*t+1/t^2. Thank you, Andrey --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] No VMWare virtual machine at mirrors
I wanted to download the current VMWare virtual version from a local mirror, but neither of the closest two mirrors (Boston, Virginia) seems to have that. They do have a link to a Windows binary distribution page, but of course there is not Windows binary yet. --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
