[sage-support] Re: Question re : ./sage -upgrade
Dear William, On Oct 20, 5:47 am, William Stein [EMAIL PROTECTED] wrote: Just do sage -upgrade again. Should this work already? Wasn't there some posts on Sage devel that for some reason upgrade to 3.1.3 or 3.1.4 was a problem? I tried a minute ago, and an upgrade (starting with 3.1.2) failed, since make claimed that there is nothing to do. Cheers Simon --~--~-~--~~~---~--~~ 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: german keybord in vmware image
mabshoff [EMAIL PROTECTED] writes: On Oct 16, 7:33 pm, Burcin Erocal [EMAIL PROTECTED] wrote: On 16 Oct 2008 20:21:55 +0200 Hi Martin, Martin Rubey [EMAIL PROTECTED] wrote: Some of my students complain that the vmware image of sage seems to use english keyboard. Is there a way to configure this? (I do not own a windows machine, so I cannot try it...) The VMware image does run on any platform where there is a VMWare player, i.e. Linux and OSX would be a possible test bed for you in case you want to play with the VMWare image. As far as I know the vmware image runs ubuntu, so one can just follow the instructions on the ubuntu community website: https://help.ubuntu.com/community/LocaleConf (scroll down for Keyboard configuration - console) Exactly. This has come up before and does solve the problem. OK, I tried it on three windows boxes - but it does not work. I did manage sudo su dpkg-reconfigure console-data select quertz, german exit, reboot. Curiously, after reboot, the keyboard is still english, but dpkg-reconfigure console-data thinks we have a german keyboard... UPDATE: using dpkg-reconfigure console-setup works. Martin --~--~-~--~~~---~--~~ 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: german keybord in vmware image
On Mon, Oct 20, 2008 at 6:08 AM, Martin Rubey [EMAIL PROTECTED] wrote: mabshoff [EMAIL PROTECTED] writes: On Oct 16, 7:33 pm, Burcin Erocal [EMAIL PROTECTED] wrote: On 16 Oct 2008 20:21:55 +0200 Hi Martin, Martin Rubey [EMAIL PROTECTED] wrote: Some of my students complain that the vmware image of sage seems to use english keyboard. Is there a way to configure this? (I do not own a windows machine, so I cannot try it...) The VMware image does run on any platform where there is a VMWare player, i.e. Linux and OSX would be a possible test bed for you in case you want to play with the VMWare image. As far as I know the vmware image runs ubuntu, so one can just follow the instructions on the ubuntu community website: https://help.ubuntu.com/community/LocaleConf (scroll down for Keyboard configuration - console) Exactly. This has come up before and does solve the problem. OK, I tried it on three windows boxes - but it does not work. I did manage sudo su dpkg-reconfigure console-data select quertz, german exit, reboot. Curiously, after reboot, the keyboard is still english, but dpkg-reconfigure console-data thinks we have a german keyboard... UPDATE: using dpkg-reconfigure console-setup works. What *precisely* works? Where would be the most useful place to add this information? In the README file that comes in the sage vmware zip? Thanks! 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: german keybord in vmware image
William Stein [EMAIL PROTECTED] writes: UPDATE: using dpkg-reconfigure console-setup works. What *precisely* works? That the key z prints a z and not a y in the console, and all the other keys seem to be in the right place, too. Where would be the most useful place to add this information? In the README file that comes in the sage vmware zip? Sorry, I have no idea. Maybe one could add the keyboard configuration as an extra menu item (parallel to sage, manage, etc.) I hate these MS Windows troubles. I spent a lot of time building FriCAS on MS Windows. Meanwhile this works more or less out of the box (I prepared Cygwin binaries, and the make process is also easy), but the first time was a nightmare. Martin --~--~-~--~~~---~--~~ 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] display 3d graphics in TeXmacs sage plugin
Hi everyone, I'm having trouble trying to display 3D graphic objects made with sage on TeXmacs. Everytime I try to plot any kind of 3D object, it just says Graphics3D Object and that's it, nothing else show up. Please anyone who knows how this works give some advise or some other option to use. Thanks in advance, Daniel --~--~-~--~~~---~--~~ 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: displaying documentation
Well, Stan has initiated the discussion about tab functionality. I've got a question to developers and may be a suggestion. When the cell comes to the end of browser window and one wants to look for available commands with tab option it shows options below the cell itself and below the end of the browser window. Basically to my unconvenience I always have to use mouse to scroll the window down. Could it be changed or improved somehow ? Thank you Serge Stan Schymanski пишет: Dear all, I can't display the documentation from the sage command line any more. Here is what happens: -- | SAGE Version 3.1.3.rc0, Release Date: 2008-10-12 | | Type notebook() for the GUI, and license() for information.| -- sage: notebook? Display all 1748 possibilities? (y or n) It seems to only see the question mark but not the command before it. If I type y, it just shows all possible commands I could use. I get the same behaviour with 3.1.2 (Intel Mac with OSX 10.4.11). Everything else works fine. Hope someone can help. Thanks a lot, Stan --~--~-~--~~~---~--~~ 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: Question re : ./sage -upgrade
On Oct 20, 12:57 am, Simon King [EMAIL PROTECTED] wrote: Dear William, On Oct 20, 5:47 am, William Stein [EMAIL PROTECTED] wrote: Just do sage -upgrade again. Should this work already? Wasn't there some posts on Sage devel that for some reason upgrade to 3.1.3 or 3.1.4 was a problem? I tried a minute ago, and an upgrade (starting with 3.1.2) failed, since make claimed that there is nothing to do. In fact I recently tried this with 3.1.3, and it tried to upgrade to 3.1.2. John --~--~-~--~~~---~--~~ 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: display 3d graphics in TeXmacs sage plugin
Hi, Daniel, On Oct 20, 2008, at 06:26 , DJDANG wrote: Hi everyone, I'm having trouble trying to display 3D graphic objects made with sage on TeXmacs. Everytime I try to plot any kind of 3D object, it just says Graphics3D Object and that's it, nothing else show up. It's hard for anyone to guess what the problem is without knowing what it is you are doing. Can you post a minimal Sage example that shows the problem? Thanks. Justin -- Justin C. Walker, Curmudgeon-At-Large Institute for the Absorption of Federal Funds If you're not confused, You're not paying attention --~--~-~--~~~---~--~~ 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: german keybord in vmware image
On Mon, Oct 20, 2008 at 6:20 AM, Martin Rubey [EMAIL PROTECTED] wrote: William Stein [EMAIL PROTECTED] writes: UPDATE: using dpkg-reconfigure console-setup works. What *precisely* works? That the key z prints a z and not a y in the console, and all the other keys seem to be in the right place, too. Sorry, I meant, of all the things you tried was just typing dpkg-reconfigure console-setup the one and only thing you did, and that it worked? Where would be the most useful place to add this information? In the README file that comes in the sage vmware zip? Sorry, I have no idea. Maybe one could add the keyboard configuration as an extra menu item (parallel to sage, manage, etc.) I hate these MS Windows troubles. I spent a lot of time building FriCAS on MS Windows. Meanwhile this works more or less out of the box (I prepared Cygwin binaries, and the make process is also easy), but the first time was a nightmare. Martin -- William Stein Associate Professor of Mathematics University of Washington http://wstein.org --~--~-~--~~~---~--~~ 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: Question re : ./sage -upgrade
On Mon, Oct 20, 2008 at 7:27 AM, John H Palmieri [EMAIL PROTECTED] wrote: On Oct 20, 12:57 am, Simon King [EMAIL PROTECTED] wrote: Dear William, On Oct 20, 5:47 am, William Stein [EMAIL PROTECTED] wrote: Just do sage -upgrade again. Should this work already? Wasn't there some posts on Sage devel that for some reason upgrade to 3.1.3 or 3.1.4 was a problem? I tried a minute ago, and an upgrade (starting with 3.1.2) failed, since make claimed that there is nothing to do. In fact I recently tried this with 3.1.3, and it tried to upgrade to 3.1.2. Sorry, my answer above was from an airport via my iphone, and I didn't realize that Michael hadn't put the new 3.1.4 spkg's up yet. I've posted them, so now sage -upgrade upgrades one to sage-3.1.4. 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: display 3d graphics in TeXmacs sage plugin
On Mon, Oct 20, 2008 at 6:26 AM, DJDANG [EMAIL PROTECTED] wrote:
Hi everyone, I'm having trouble trying to display 3D graphic objects
made with sage on TeXmacs. Everytime I try to plot any kind of 3D
object, it just says Graphics3D Object and that's it, nothing else
show up.
Please anyone who knows how this works give some advise or some other
option to use.
The texmacs/sage interface was written by Mike Hansen before
Sage had any 3D plotting, so I suspect it doesn't at all support
it. That said, two questions:
(1) does 2D plotting work?
(2) What happens if you do
sage: var('x,y')
sage: plot3d(sin(x*y),(x,-1,1),(y,-1,1)).show()
(3) What if you do
sage: var('x,y')
sage: plot3d(sin(x*y),(x,-1,1),(y,-1,1)).show(viewer='tachyon')
Thanks in advance,
Daniel
--
William Stein
Associate Professor of Mathematics
University of Washington
http://wstein.org
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[sage-support] Publishing from localhost
Hi all, I've been working on Sage from the version I recently downloaded to my mac. I have no problems opening up notebooks and working in my localhost location through my web browser. However, I wasn't able to publish these notebooks externally; they only come up as, e.g., http://localhost:8000/home/pub/1,; which I was unable to access just from a web browser. Any help would be appreciated. Thanks, Graham --~--~-~--~~~---~--~~ 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: Publishing from localhost
On Mon, Oct 20, 2008 at 8:41 AM, Graham [EMAIL PROTECTED] wrote: Hi all, I've been working on Sage from the version I recently downloaded to my mac. I have no problems opening up notebooks and working in my localhost location through my web browser. However, I wasn't able to publish these notebooks externally; they only come up as, e.g., http://localhost:8000/home/pub/1,; which I was unable to access just from a web browser. Any help would be appreciated. Unfortunately, there is no support for publishing from a local Sage install. I'm actually not quite sure what that would mean even. Probably your best bet is to use t Download button, download the worksheet, then post a link to the sws file somewhere on your website. When (not if) the public sage notebook server is back (sagenb.org) then you could upload the sws file to your account there and click on publish. 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: german keybord in vmware image
William Stein [EMAIL PROTECTED] writes: On Mon, Oct 20, 2008 at 6:20 AM, Martin Rubey [EMAIL PROTECTED] wrote: William Stein [EMAIL PROTECTED] writes: UPDATE: using dpkg-reconfigure console-setup works. What *precisely* works? That the key z prints a z and not a y in the console, and all the other keys seem to be in the right place, too. Sorry, I meant, of all the things you tried was just typing dpkg-reconfigure console-setup the one and only thing you did, and that it worked? Nearly: you will then be asked some simple questions which are obvious to answer if you do not have an english keyboard. Martin --~--~-~--~~~---~--~~ 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: Upgrade failed in Givaro
On Oct 20, 9:01 am, Simon King [EMAIL PROTECTED] wrote: Dear Team, after William's recent post that an upgrade to 3.1.4 should now be possible. I tried, but it failed. Strange: There was no new install.log (AFAIK, an upgrade should produce a new one). Last words on the screen: /home/king/SAGE/devel/sage-3.1.1/local/lib/../lib/libstdc++.so: could not read symbols: File in wrong format This looks like a problem with your toolchain since we don't ship any libstdc++.so since it is provided by the C++ compiler. SNIP I tried to remove the givaro spkg and do upgrade again, but the same problem occured. What can I do? Cheers Simon Cheers, Michael --~--~-~--~~~---~--~~ 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] Upgrade failed in Givaro
Dear Team, after William's recent post that an upgrade to 3.1.4 should now be possible. I tried, but it failed. Strange: There was no new install.log (AFAIK, an upgrade should produce a new one). Last words on the screen: /home/king/SAGE/devel/sage-3.1.1/local/lib/../lib/libstdc++.so: could not read symbols: File in wrong format collect2: ld returned 1 exit status make[3]: *** [libgivaro.la] Fehler 1 make[3]: Leaving directory `/home/king/SAGE/devel/sage-3.1.1/spkg/ build/givaro-3.2.13rc2/src/src' make[2]: *** [install-recursive] Fehler 1 make[2]: Leaving directory `/home/king/SAGE/devel/sage-3.1.1/spkg/ build/givaro-3.2.13rc2/src/src' make[1]: *** [install-recursive] Fehler 1 make[1]: Leaving directory `/home/king/SAGE/devel/sage-3.1.1/spkg/ build/givaro-3.2.13rc2/src' Error installing givaro I tried to remove the givaro spkg and do upgrade again, but the same problem occured. What can I do? Cheers Simon --~--~-~--~~~---~--~~ 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: german keybord in vmware image
On Mon, Oct 20, 2008 at 8:52 AM, Martin Rubey [EMAIL PROTECTED] wrote: William Stein [EMAIL PROTECTED] writes: On Mon, Oct 20, 2008 at 6:20 AM, Martin Rubey [EMAIL PROTECTED] wrote: William Stein [EMAIL PROTECTED] writes: UPDATE: using dpkg-reconfigure console-setup works. What *precisely* works? That the key z prints a z and not a y in the console, and all the other keys seem to be in the right place, too. Sorry, I meant, of all the things you tried was just typing dpkg-reconfigure console-setup the one and only thing you did, and that it worked? Nearly: you will then be asked some simple questions which are obvious to answer if you do not have an english keyboard. Excellent, thanks. See http://trac.sagemath.org/sage_trac/ticket/4331 --~--~-~--~~~---~--~~ 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: Upgrade failed in Givaro
Hi Michael, On Oct 20, 6:09 pm, mabshoff [EMAIL PROTECTED] dortmund.de wrote: This looks like a problem with your toolchain since we don't ship any libstdc++.so since it is provided by the C++ compiler. Ok. I have two versions of gcc on my machine, but the problem occurs in both cases. I think it'll be better to try from scratch (i.e., from sources). Yours Simon --~--~-~--~~~---~--~~ 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: Question re : ./sage -upgrade
On Oct 20, 7:50 am, William Stein [EMAIL PROTECTED] wrote: Sorry, my answer above was from an airport via my iphone, Now you're just showing off... John --~--~-~--~~~---~--~~ 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: Upgrade failed in Givaro
Dear Michael, On Oct 20, 7:05 pm, Simon King [EMAIL PROTECTED] wrote: I think it'll be better to try from scratch (i.e., from sources). ... and that worked. However, is it normal that the attempt to upgrade did *not* result in an install.log? Yours Simon --~--~-~--~~~---~--~~ 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: Upgrade failed in Givaro
On Oct 20, 2:01 pm, Simon King [EMAIL PROTECTED] wrote: Dear Michael, On Oct 20, 7:05 pm, Simon King [EMAIL PROTECTED] wrote: I think it'll be better to try from scratch (i.e., from sources). ... and that worked. As long as you copy libstc++.so into $SAGE_LOCAL/lib Sage will likely break on upgrade unless you use the same gcc you build Sage with. That means setting PATH as well as LD_LIBRARY_PATH correctly. However, is it normal that the attempt to upgrade did *not* result in an install.log? I have no clue what is going on with your build, but something is FUBAR. I get an updated install.log every time I do an upgrade on one of my test installs. Yours Simon Cheers, Michael --~--~-~--~~~---~--~~ 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: multiply a list by a constant
Thanks Marshall. I have thought about that as well. Since I want to optimize time. I want to see if your method is faster then a for loop. However, I run into something puzzling: vector( [k for k in range(10)]) results in an error. Sage compliant about TypeError: unable to find a common ring for all elements But if you check each element of the list, I got type 'int' So why SAGE is complaining? On Oct 19, 7:27 am, Marshall Hampton [EMAIL PROTECTED] wrote: Another option is to convert your list to a vector, and then convert it back. This is more awkward for a single operation but if you are doing lots of vector addition and scalar multiplication it can be the way to go. I.e. you can do: sage: a = [3,4] sage: a = list(2*vector(a)) sage: a [6, 8] -M. Hampton On Oct 19, 1:15 am, Robert Bradshaw [EMAIL PROTECTED] wrote: On Oct 18, 2008, at 10:14 PM, Alex Ghitza wrote: Hmmm. As far as I know you can use _ as a placeholder for a variable, and it's meant for this kind of use (where you don't really want to introduce a new variable name). It's strange that it doesn't work for you. Can you post the error message that you get? Actually, _ is an actual variable, though personally I find it a bit harder to read than a normal letter. The one special thing about it (in ipython at least) is that it constantly gets reassigned to the last returned value, e.g. sage: 1+2 3 sage: _ 3 - 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] Re: multiply a list by a constant
On Mon, Oct 20, 2008 at 2:06 PM, pong [EMAIL PROTECTED] wrote: Thanks Marshall. I have thought about that as well. Since I want to optimize time. I want to see if your method is faster then a for loop. However, I run into something puzzling: vector( [k for k in range(10)]) results in an error. Sage compliant about TypeError: unable to find a common ring for all elements I get sage: vector( [k for k in range(10)]) (0, 1, 2, 3, 4, 5, 6, 7, 8, 9) Are you sure that's what you typed? But if you check each element of the list, I got type 'int' So why SAGE is complaining? On Oct 19, 7:27 am, Marshall Hampton [EMAIL PROTECTED] wrote: Another option is to convert your list to a vector, and then convert it back. This is more awkward for a single operation but if you are doing lots of vector addition and scalar multiplication it can be the way to go. I.e. you can do: sage: a = [3,4] sage: a = list(2*vector(a)) sage: a [6, 8] -M. Hampton On Oct 19, 1:15 am, Robert Bradshaw [EMAIL PROTECTED] wrote: On Oct 18, 2008, at 10:14 PM, Alex Ghitza wrote: Hmmm. As far as I know you can use _ as a placeholder for a variable, and it's meant for this kind of use (where you don't really want to introduce a new variable name). It's strange that it doesn't work for you. Can you post the error message that you get? Actually, _ is an actual variable, though personally I find it a bit harder to read than a normal letter. The one special thing about it (in ipython at least) is that it constantly gets reassigned to the last returned value, e.g. sage: 1+2 3 sage: _ 3 - Robert -- William Stein Associate Professor of Mathematics University of Washington http://wstein.org --~--~-~--~~~---~--~~ 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: multiply a list by a constant
Yes, that's what I got. Maybe because I'm only using SAGE 3.1.1 or there is something wrong with the installation. sage: vector([k for k in range(10)]) --- TypeError Traceback (most recent call last) /home/pong/sage/ipython console in module() /home/pong/sage/free_module_element.pyx in sage.modules.free_module_element.vector (sage/modules/ free_module_element.c:2376)() /home/pong/sage/free_module_element.pyx in sage.modules.free_module_element.prepare (sage/modules/ free_module_element.c:2622)() TypeError: unable to find a common ring for all elements On Oct 20, 2:09 pm, William Stein [EMAIL PROTECTED] wrote: On Mon, Oct 20, 2008 at 2:06 PM, pong [EMAIL PROTECTED] wrote: Thanks Marshall. I have thought about that as well. Since I want to optimize time. I want to see if your method is faster then a for loop. However, I run into something puzzling: vector( [k for k in range(10)]) results in an error. Sage compliant about TypeError: unable to find a common ring for all elements I get sage: vector( [k for k in range(10)]) (0, 1, 2, 3, 4, 5, 6, 7, 8, 9) Are you sure that's what you typed? But if you check each element of the list, I got type 'int' So why SAGE is complaining? On Oct 19, 7:27 am, Marshall Hampton [EMAIL PROTECTED] wrote: Another option is to convert your list to a vector, and then convert it back. This is more awkward for a single operation but if you are doing lots of vector addition and scalar multiplication it can be the way to go. I.e. you can do: sage: a = [3,4] sage: a = list(2*vector(a)) sage: a [6, 8] -M. Hampton On Oct 19, 1:15 am, Robert Bradshaw [EMAIL PROTECTED] wrote: On Oct 18, 2008, at 10:14 PM, Alex Ghitza wrote: Hmmm. As far as I know you can use _ as a placeholder for a variable, and it's meant for this kind of use (where you don't really want to introduce a new variable name). It's strange that it doesn't work for you. Can you post the error message that you get? Actually, _ is an actual variable, though personally I find it a bit harder to read than a normal letter. The one special thing about it (in ipython at least) is that it constantly gets reassigned to the last returned value, e.g. sage: 1+2 3 sage: _ 3 - Robert -- William Stein Associate Professor of Mathematics University of Washingtonhttp://wstein.org --~--~-~--~~~---~--~~ 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: multiply a list by a constant
On Mon, Oct 20, 2008 at 2:24 PM, pong [EMAIL PROTECTED] wrote: Yes, that's what I got. Maybe because I'm only using SAGE 3.1.1 or there is something wrong with the installation. I bet that's the case. You should maybe upgrade. We'll be posting binaries soon. William sage: vector([k for k in range(10)]) --- TypeError Traceback (most recent call last) /home/pong/sage/ipython console in module() /home/pong/sage/free_module_element.pyx in sage.modules.free_module_element.vector (sage/modules/ free_module_element.c:2376)() /home/pong/sage/free_module_element.pyx in sage.modules.free_module_element.prepare (sage/modules/ free_module_element.c:2622)() TypeError: unable to find a common ring for all elements On Oct 20, 2:09 pm, William Stein [EMAIL PROTECTED] wrote: On Mon, Oct 20, 2008 at 2:06 PM, pong [EMAIL PROTECTED] wrote: Thanks Marshall. I have thought about that as well. Since I want to optimize time. I want to see if your method is faster then a for loop. However, I run into something puzzling: vector( [k for k in range(10)]) results in an error. Sage compliant about TypeError: unable to find a common ring for all elements I get sage: vector( [k for k in range(10)]) (0, 1, 2, 3, 4, 5, 6, 7, 8, 9) Are you sure that's what you typed? But if you check each element of the list, I got type 'int' So why SAGE is complaining? On Oct 19, 7:27 am, Marshall Hampton [EMAIL PROTECTED] wrote: Another option is to convert your list to a vector, and then convert it back. This is more awkward for a single operation but if you are doing lots of vector addition and scalar multiplication it can be the way to go. I.e. you can do: sage: a = [3,4] sage: a = list(2*vector(a)) sage: a [6, 8] -M. Hampton On Oct 19, 1:15 am, Robert Bradshaw [EMAIL PROTECTED] wrote: On Oct 18, 2008, at 10:14 PM, Alex Ghitza wrote: Hmmm. As far as I know you can use _ as a placeholder for a variable, and it's meant for this kind of use (where you don't really want to introduce a new variable name). It's strange that it doesn't work for you. Can you post the error message that you get? Actually, _ is an actual variable, though personally I find it a bit harder to read than a normal letter. The one special thing about it (in ipython at least) is that it constantly gets reassigned to the last returned value, e.g. sage: 1+2 3 sage: _ 3 - Robert -- William Stein Associate Professor of Mathematics University of Washingtonhttp://wstein.org -- William Stein Associate Professor of Mathematics University of Washington http://wstein.org --~--~-~--~~~---~--~~ 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: multiply a list by a constant
William Stein wrote: On Mon, Oct 20, 2008 at 2:06 PM, pong [EMAIL PROTECTED] wrote: Thanks Marshall. I have thought about that as well. Since I want to optimize time. I want to see if your method is faster then a for loop. However, I run into something puzzling: vector( [k for k in range(10)]) results in an error. Sage compliant about TypeError: unable to find a common ring for all elements I get sage: vector( [k for k in range(10)]) (0, 1, 2, 3, 4, 5, 6, 7, 8, 9) Are you sure that's what you typed? It seems like this error was fixed recently. Pong, what version of Sage are you running? Jason --~--~-~--~~~---~--~~ 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 -~--~~~~--~~--~--~---
