[sage-support] Re: Notebook can't view files
I wonder if this is a permissions issue - ? I have had some similar problems in the past, some of which were permission-related. Others I think arose from changes to the notebook and I never figured them out, nor was I able to reprduce them (so I never filed a ticket), but that was about a year ago, and I have not had problems since. -M. Hampton On Nov 8, 10:06 pm, "William Stein" <[EMAIL PROTECTED]> wrote: > On Fri, Nov 7, 2008 at 4:30 PM, M. Yurko <[EMAIL PROTECTED]> wrote: > > > I recently upgraded to the new version (3.1.4), and I can't view any > > of the worksheets that I create. > > What version did you upgrade from? > > > When I open up the notebook, no > > worksheets are present even after I created a new one. I checked the > > sage_notebook folder, and the files are being created, but for some > > reason they are not showing up on the notebook. If anyone could help, > > I would greatly appreciate it. > > Are you looking at $HOME/.sage/sage_notebook? > > You might try moving that folder out of the way and creating > a new notebook from scratch. > > Are there worksheet.txt files from your old notebook? > If so you can paste their text into a fresh worksheet (after clicking "Edit"). > > > > > Michael Yurko > > -- > 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: Notebook can't view files
Before, I was using 3.0.1 I believe, but I ended up having to do a reformat (by Ubuntu installation gave a kernel panic after the upgrade to Intrepid), and so it was a fresh installation. I copied the old notebook folder from the old installation. When I didn't see them after adding them back I, then removed them and tried to see a newly created worksheet, but it didn't show up after restarting the server. I am going to try and re-download and reinstall, but if that fails, I'll report back. Thanks for your responses. Michael Yurko On Nov 8, 11:16 am, Marshall Hampton <[EMAIL PROTECTED]> wrote: > I wonder if this is a permissions issue - ? I have had some similar > problems in the past, some of which were permission-related. Others I > think arose from changes to the notebook and I never figured them out, > nor was I able to reprduce them (so I never filed a ticket), but that > was about a year ago, and I have not had problems since. > > -M. Hampton > > On Nov 8, 10:06 pm, "William Stein" <[EMAIL PROTECTED]> wrote: > > > On Fri, Nov 7, 2008 at 4:30 PM, M. Yurko <[EMAIL PROTECTED]> wrote: > > > > I recently upgraded to the new version (3.1.4), and I can't view any > > > of the worksheets that I create. > > > What version did you upgrade from? > > > > When I open up the notebook, no > > > worksheets are present even after I created a new one. I checked the > > > sage_notebook folder, and the files are being created, but for some > > > reason they are not showing up on the notebook. If anyone could help, > > > I would greatly appreciate it. > > > Are you looking at $HOME/.sage/sage_notebook? > > > You might try moving that folder out of the way and creating > > a new notebook from scratch. > > > Are there worksheet.txt files from your old notebook? > > If so you can paste their text into a fresh worksheet (after clicking > > "Edit"). > > > > Michael Yurko > > > -- > > 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: Notebook can't view files
That sounds like a problem with permissions. On Sat, Nov 8, 2008 at 4:32 PM, M. Yurko <[EMAIL PROTECTED]> wrote: > > Before, I was using 3.0.1 I believe, but I ended up having to do a > reformat (by Ubuntu installation gave a kernel panic after the upgrade > to Intrepid), and so it was a fresh installation. I copied the old > notebook folder from the old installation. When I didn't see them > after adding them back I, then removed them and tried to see a newly > created worksheet, but it didn't show up after restarting the server. > I am going to try and re-download and reinstall, but if that fails, > I'll report back. Thanks for your responses. > > Michael Yurko > On Nov 8, 11:16 am, Marshall Hampton <[EMAIL PROTECTED]> wrote: >> I wonder if this is a permissions issue - ? I have had some similar >> problems in the past, some of which were permission-related. Others I >> think arose from changes to the notebook and I never figured them out, >> nor was I able to reprduce them (so I never filed a ticket), but that >> was about a year ago, and I have not had problems since. >> >> -M. Hampton >> >> On Nov 8, 10:06 pm, "William Stein" <[EMAIL PROTECTED]> wrote: >> >> > On Fri, Nov 7, 2008 at 4:30 PM, M. Yurko <[EMAIL PROTECTED]> wrote: >> >> > > I recently upgraded to the new version (3.1.4), and I can't view any >> > > of the worksheets that I create. >> >> > What version did you upgrade from? >> >> > > When I open up the notebook, no >> > > worksheets are present even after I created a new one. I checked the >> > > sage_notebook folder, and the files are being created, but for some >> > > reason they are not showing up on the notebook. If anyone could help, >> > > I would greatly appreciate it. >> >> > Are you looking at $HOME/.sage/sage_notebook? >> >> > You might try moving that folder out of the way and creating >> > a new notebook from scratch. >> >> > Are there worksheet.txt files from your old notebook? >> > If so you can paste their text into a fresh worksheet (after clicking >> > "Edit"). >> >> > > Michael Yurko >> >> > -- >> > 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: Notebook can't view files
If its a problem with permissions, then how would I verify this and fix it. I've only been using linux for about 8 months On Nov 8, 5:48 pm, "Timothy Clemans" <[EMAIL PROTECTED]> wrote: > That sounds like a problem with permissions. > > On Sat, Nov 8, 2008 at 4:32 PM, M. Yurko <[EMAIL PROTECTED]> wrote: > > > Before, I was using 3.0.1 I believe, but I ended up having to do a > > reformat (by Ubuntu installation gave a kernel panic after the upgrade > > to Intrepid), and so it was a fresh installation. I copied the old > > notebook folder from the old installation. When I didn't see them > > after adding them back I, then removed them and tried to see a newly > > created worksheet, but it didn't show up after restarting the server. > > I am going to try and re-download and reinstall, but if that fails, > > I'll report back. Thanks for your responses. > > > Michael Yurko > > On Nov 8, 11:16 am, Marshall Hampton <[EMAIL PROTECTED]> wrote: > >> I wonder if this is a permissions issue - ? I have had some similar > >> problems in the past, some of which were permission-related. Others I > >> think arose from changes to the notebook and I never figured them out, > >> nor was I able to reprduce them (so I never filed a ticket), but that > >> was about a year ago, and I have not had problems since. > > >> -M. Hampton > > >> On Nov 8, 10:06 pm, "William Stein" <[EMAIL PROTECTED]> wrote: > > >> > On Fri, Nov 7, 2008 at 4:30 PM, M. Yurko <[EMAIL PROTECTED]> wrote: > > >> > > I recently upgraded to the new version (3.1.4), and I can't view any > >> > > of the worksheets that I create. > > >> > What version did you upgrade from? > > >> > > When I open up the notebook, no > >> > > worksheets are present even after I created a new one. I checked the > >> > > sage_notebook folder, and the files are being created, but for some > >> > > reason they are not showing up on the notebook. If anyone could help, > >> > > I would greatly appreciate it. > > >> > Are you looking at $HOME/.sage/sage_notebook? > > >> > You might try moving that folder out of the way and creating > >> > a new notebook from scratch. > > >> > Are there worksheet.txt files from your old notebook? > >> > If so you can paste their text into a fresh worksheet (after clicking > >> > "Edit"). > > >> > > Michael Yurko > > >> > -- > >> > 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: Notebook can't view files
On Sat, Nov 8, 2008 at 3:03 PM, M. Yurko <[EMAIL PROTECTED]> wrote: > > If its a problem with permissions, then how would I verify this and > fix it. I've only been using linux for about 8 months Type something like the following at the command line, where Myurko gets replaced by your Linux username: chown Myurko. -R $HOME/.sage > > On Nov 8, 5:48 pm, "Timothy Clemans" <[EMAIL PROTECTED]> > wrote: >> That sounds like a problem with permissions. >> >> On Sat, Nov 8, 2008 at 4:32 PM, M. Yurko <[EMAIL PROTECTED]> wrote: >> >> > Before, I was using 3.0.1 I believe, but I ended up having to do a >> > reformat (by Ubuntu installation gave a kernel panic after the upgrade >> > to Intrepid), and so it was a fresh installation. I copied the old >> > notebook folder from the old installation. When I didn't see them >> > after adding them back I, then removed them and tried to see a newly >> > created worksheet, but it didn't show up after restarting the server. >> > I am going to try and re-download and reinstall, but if that fails, >> > I'll report back. Thanks for your responses. >> >> > Michael Yurko >> > On Nov 8, 11:16 am, Marshall Hampton <[EMAIL PROTECTED]> wrote: >> >> I wonder if this is a permissions issue - ? I have had some similar >> >> problems in the past, some of which were permission-related. Others I >> >> think arose from changes to the notebook and I never figured them out, >> >> nor was I able to reprduce them (so I never filed a ticket), but that >> >> was about a year ago, and I have not had problems since. >> >> >> -M. Hampton >> >> >> On Nov 8, 10:06 pm, "William Stein" <[EMAIL PROTECTED]> wrote: >> >> >> > On Fri, Nov 7, 2008 at 4:30 PM, M. Yurko <[EMAIL PROTECTED]> wrote: >> >> >> > > I recently upgraded to the new version (3.1.4), and I can't view any >> >> > > of the worksheets that I create. >> >> >> > What version did you upgrade from? >> >> >> > > When I open up the notebook, no >> >> > > worksheets are present even after I created a new one. I checked the >> >> > > sage_notebook folder, and the files are being created, but for some >> >> > > reason they are not showing up on the notebook. If anyone could help, >> >> > > I would greatly appreciate it. >> >> >> > Are you looking at $HOME/.sage/sage_notebook? >> >> >> > You might try moving that folder out of the way and creating >> >> > a new notebook from scratch. >> >> >> > Are there worksheet.txt files from your old notebook? >> >> > If so you can paste their text into a fresh worksheet (after clicking >> >> > "Edit"). >> >> >> > > Michael Yurko >> >> >> > -- >> >> > 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: Notebook can't view files
OK, I typed that line in and I got no output and no errors. On Nov 8, 6:12 pm, "William Stein" <[EMAIL PROTECTED]> wrote: > On Sat, Nov 8, 2008 at 3:03 PM, M. Yurko <[EMAIL PROTECTED]> wrote: > > > If its a problem with permissions, then how would I verify this and > > fix it. I've only been using linux for about 8 months > > Type something like the following at the command line, > where Myurko gets replaced by your Linux username: > > chown Myurko. -R $HOME/.sage > > > > > > > On Nov 8, 5:48 pm, "Timothy Clemans" <[EMAIL PROTECTED]> > > wrote: > >> That sounds like a problem with permissions. > > >> On Sat, Nov 8, 2008 at 4:32 PM, M. Yurko <[EMAIL PROTECTED]> wrote: > > >> > Before, I was using 3.0.1 I believe, but I ended up having to do a > >> > reformat (by Ubuntu installation gave a kernel panic after the upgrade > >> > to Intrepid), and so it was a fresh installation. I copied the old > >> > notebook folder from the old installation. When I didn't see them > >> > after adding them back I, then removed them and tried to see a newly > >> > created worksheet, but it didn't show up after restarting the server. > >> > I am going to try and re-download and reinstall, but if that fails, > >> > I'll report back. Thanks for your responses. > > >> > Michael Yurko > >> > On Nov 8, 11:16 am, Marshall Hampton <[EMAIL PROTECTED]> wrote: > >> >> I wonder if this is a permissions issue - ? I have had some similar > >> >> problems in the past, some of which were permission-related. Others I > >> >> think arose from changes to the notebook and I never figured them out, > >> >> nor was I able to reprduce them (so I never filed a ticket), but that > >> >> was about a year ago, and I have not had problems since. > > >> >> -M. Hampton > > >> >> On Nov 8, 10:06 pm, "William Stein" <[EMAIL PROTECTED]> wrote: > > >> >> > On Fri, Nov 7, 2008 at 4:30 PM, M. Yurko <[EMAIL PROTECTED]> wrote: > > >> >> > > I recently upgraded to the new version (3.1.4), and I can't view any > >> >> > > of the worksheets that I create. > > >> >> > What version did you upgrade from? > > >> >> > > When I open up the notebook, no > >> >> > > worksheets are present even after I created a new one. I checked the > >> >> > > sage_notebook folder, and the files are being created, but for some > >> >> > > reason they are not showing up on the notebook. If anyone could > >> >> > > help, > >> >> > > I would greatly appreciate it. > > >> >> > Are you looking at $HOME/.sage/sage_notebook? > > >> >> > You might try moving that folder out of the way and creating > >> >> > a new notebook from scratch. > > >> >> > Are there worksheet.txt files from your old notebook? > >> >> > If so you can paste their text into a fresh worksheet (after clicking > >> >> > "Edit"). > > >> >> > > Michael Yurko > > >> >> > -- > >> >> > William Stein > >> >> > Associate Professor of Mathematics > >> >> > University of Washingtonhttp://wstein.org > > -- > 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: tan(pi/2) unevaluated?
On Fri, Nov 7, 2008 at 8:52 PM, Gary <[EMAIL PROTECTED]> wrote:
>
> Hello all :-)
>
> I'm new to sage and to this group.
>
> I teach at a two-year college and have been exploring the
> possibilities of incorporating sage into some of my classes. On my
> laptop I also have Mathematica and Matlab installed and have used
> Maple in the past as well.
>
> I started experimenting with sage because it would provide a free
> (yay!) alternative to the programs mentioned above; this is a big plus
> for my students already burdened with the high cost of their
> textbooks. With the small amount of exposure to sage I've had so far,
> I can say that I find it useful and powerful. It is also, to me,
> confusing at time but to be fair so too are Mathematica and Maple.
>
> Now to the problem at hand.
>
> I've been trying to evaluate a symbolic double integral but am
> perplexed by the unevaluated tan(pi/2) expressions in the result since
> tan(pi/2) is undefined. What am I missing here and what do I need to
> do to get this to evaluate to the correct value of
> (4*pi - 3*sqrt(3))*a^2/6?
>
> Thanks much,
> Gary
>
> sage input:
> ***
> var('a r theta')
> assume(a > 0)
> integral(integral(r, r, a*csc(theta), 2*a), theta, pi/6, pi/2)
> ***
>
> sage output:
> *
> (2*pi*tan(pi/2) + 1)*a^2/(2*tan(pi/2)) - (2*pi + 3*sqrt(3))*a^2/6
> *
>
Maxima actually does all the symbolic integration
in Sage, currently, so I've forwarded your email
to Robert Dodier -- lead developer of Maxima.
William
>
>
> >
>
--
William Stein
Associate Professor of Mathematics
University of Washington
http://wstein.org
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[sage-support] Re: tan(pi/2) unevaluated?
Gary wrote:
> I've been trying to evaluate a symbolic double integral but am
> perplexed by the unevaluated tan(pi/2) expressions in the result since
> tan(pi/2) is undefined. What am I missing here and what do I need to
> do to get this to evaluate to the correct value of
> (4*pi - 3*sqrt(3))*a^2/6?
> sage input:
> ***
> var('a r theta')
> assume(a > 0)
> integral(integral(r, r, a*csc(theta), 2*a), theta, pi/6, pi/2)
> ***
>
> sage output:
> *
> (2*pi*tan(pi/2) + 1)*a^2/(2*tan(pi/2)) - (2*pi + 3*sqrt(3))*a^2/6
> *
Sage punts to Maxima to do symbolic integrals.
In this case, Maxima computed an antiderivative and plugged
in the limits of integration. You can coax Maxima into doing
the right thing by computing a limit:
assume (a > 0, bb > 0, bb > %pi/6);
integrate (integrate (r, r, a*csc(theta), 2*a), theta, %pi/6, bb);
=> (4*a^2*bb*tan(bb)+a^2)/(2*tan(bb))-(2*%pi+3*sqrt(3))*a^2/6
limit (%, bb, %pi/2, minus);
=> (4*%pi-3*sqrt(3))*a^2/6
I guess Maxima could apply the limit automatically -- that
shouldn't change the result for most integrals, but gets the
correct result in cases like this. Opinions from the Maxima
crowd are welcome.
best
Robert Dodier
--~--~-~--~~~---~--~~
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[sage-support] Drawing points on a sphere
Hi, Plotting an sphere is straightforward but I need help in how to draw points on the sphere. The sphere will represent the Earth and the points will be some geo-coordinates . Thanks!!! --~--~-~--~~~---~--~~ 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] like prolog
can I program stuff in Sage, like the stuff I can program in prolog? I have programmed several prolog programs and I wish I could code them in Sage, for example, a program that having an input: P -> (Q -> P) its output is true. --~--~-~--~~~---~--~~ 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: Drawing points on a sphere
On Nov 8, 2008, at 7:52 PM, acardh wrote: > Hi, > Plotting an sphere is straightforward but I need help in how to draw > points on the sphere. The sphere will represent the Earth and the > points will be some geo-coordinates . > > Thanks!!! This depends on how your points are given. I'm going to assume you have latitude/longitude (in degrees), called phi and theta respectively. Then one would draw the sphere via sage: world = sphere((0,0,0), radius=1, color='blue') Here I'm making 100 random cities. sage: cities = [(ZZ.random_element(-180,180), ZZ.random_element (-90,90)) for _ in range(100)] Now I'll convert polar coordinates to regular xyz coordinates. sage: t = RDF(pi/180) sage: city_coords = [(cos(t*theta)*cos(t*phi), sin(t*theta)*cos (t*phi), sin(t*phi)) for theta, phi in cities] Now I'll plot them sage: world + sum([point3d(v, color='red') for v in city_coords]) I could have, of course, done something more interesting than "points" sage: world + sum([tetrahedron(size=.1, color='yellow').translate(v) for v in city_coords]) - 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 -~--~~~~--~~--~--~---
