[sage-support] Re: 3D animation

2009-02-24 Thread Crab

Thanks, but I forgot to say my colleague has actually looked into Jmol
and his conclusion is that the language is a bit too "Chemistry
oriented" for him. That's why he goes back to use Mathematica.

I surely hope SAGE can tap into the power of Jmol in a not too distant
future. Meanwhile we will give the Tachyon method a try.

On Feb 24, 5:08 pm, Jason Grout  wrote:
> pong wrote:
> > A colleague of mine would like to produce some 3D animation (an
> > illustration involving cones and spheres). He looked into SAGE and
> > said it will be difficult compare to Mathematica and so he decided to
> > use the latter.
>
> > By reading this group, I understand one can render the images via
> > tachyon then produce the animation by imagemagick. I just wonder if
> > there is any update (easier way) to do this.
>
> Jmol (our 3d graphic viewer) has some very nice animation capabilities.
>   We haven't tapped those in Sage yet, though.  There are lots of demos
> up online.  A quick Google search yields these, for example:
>
> http://jmol.sourceforge.net/demo/animation/
>
> http://www3.interscience.wiley.com:8100/legacy/college/boyer/04716617...
>
> http://www.umass.edu/molvis/martz/lectures/labmolgen/mj2.htm
>
> http://www.chem.ucalgary.ca/courses/351/Carey5th/Ch03/ch3-06.html
>
> Basically, jmol has a scripting language that lets you animate things in
> the image.
>
> It would be cool if Sage could automatically write such an animation
> script from some sort of Sage plot command...
>
> Jason
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[sage-support] Re: 3D animation

2009-02-24 Thread Jason Grout

pong wrote:
> A colleague of mine would like to produce some 3D animation (an
> illustration involving cones and spheres). He looked into SAGE and
> said it will be difficult compare to Mathematica and so he decided to
> use the latter.
> 
> By reading this group, I understand one can render the images via
> tachyon then produce the animation by imagemagick. I just wonder if
> there is any update (easier way) to do this.


Jmol (our 3d graphic viewer) has some very nice animation capabilities. 
  We haven't tapped those in Sage yet, though.  There are lots of demos 
up online.  A quick Google search yields these, for example:

http://jmol.sourceforge.net/demo/animation/

http://www3.interscience.wiley.com:8100/legacy/college/boyer/0471661791/structure/jmol_intro/jmol.htm

http://www.umass.edu/molvis/martz/lectures/labmolgen/mj2.htm

http://www.chem.ucalgary.ca/courses/351/Carey5th/Ch03/ch3-06.html

Basically, jmol has a scripting language that lets you animate things in 
the image.

It would be cool if Sage could automatically write such an animation 
script from some sort of Sage plot command...

Jason




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[sage-support] 3D animation

2009-02-24 Thread pong

A colleague of mine would like to produce some 3D animation (an
illustration involving cones and spheres). He looked into SAGE and
said it will be difficult compare to Mathematica and so he decided to
use the latter.

By reading this group, I understand one can render the images via
tachyon then produce the animation by imagemagick. I just wonder if
there is any update (easier way) to do this.

Also it looks like some of the older correspondence in this group is
not available (can see the title) but not the content, can someone
tell me why?

Thanks in advance
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[sage-support] Re: Cannot pretty print in sage

2009-02-24 Thread William Stein

On Tue, Feb 24, 2009 at 2:51 PM, Jason Grout
 wrote:
>
> Ondrej Certik wrote:
>> On Tue, Feb 24, 2009 at 2:12 PM, Jason Grout
>>  wrote:
>>> Ondrej Certik wrote:
 On Tue, Feb 17, 2009 at 1:43 PM, Ondrej Certik  wrote:
> On Tue, Feb 17, 2009 at 1:39 PM, Carl Witty  wrote:
>> On Feb 17, 1:09 pm, Jason Grout  wrote:
>>> schmmd wrote:
 I don't seem to be able to pretty print in sage.  I remember doing
 this in class, but the pretty_print function gives the error "It looks
 like jsMath failed to set up properly (error code -7).  I will try to
 keep going, but it could get ugly." when I use it in the notebook
 through vmware or the notebook on one of the public web servers.  Am I
 doing anything wrong?  How can I, for example, print a matrix with
 latex formatting?
>>> You are doing things correctly.  You just need to install some fonts.
>>> See 
>>> http://wiki.sagemath.org/faq#IgetanerrorfromjsMathorthemathsymbolsdon...
>> Where does this error message come from?  How hard would it be to
>> change it to refer to
>> http://wiki.sagemath.org/faq#IgetanerrorfromjsMathorthemathsymbolsdon.27tlookrightwhendisplayinginthenotebook
>> ?
>>
>> (I think this might be worth doing even if it requires patching
>> jsMath.)
> I am getting the same error, so I followed up the wiki and I installed
> both jsmath-fonts and smath-fonts-sprite packages in Ubuntu, but the
> error still stays...
>>>
>>> Install the jsmath-image-fonts spkg (i.e., *sage* package, not ubuntu
>>> package), and the error should go away...I think...
>>
>> Ah -- I was stupid, yes, this fixes the problem! Thanks a lot!
>>
>>> That said, I agree that the error message is annoying, though it's
>>> probably annoying for a reason...
>>
>> So maybe jsmath-image-fonts could be in Sage by default?
>>
>
> It's too big---something like 80MB unzipped (lots and lots and lots of
> little tiny image files; one for each character).
>
> The error message should be changed, and we ought to distribute the
> fonts from the jsmath homepage with Sage, so that instead of an error
> message, there is a nice helpful link that says something like "to get
> much better fonts, click here and follow these instructions, or install
> the jsmath-image-fonts spkg"

+1!!  We've been meaning to do that forever...

William

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[sage-support] Re: Cannot pretty print in sage

2009-02-24 Thread Jason Grout

Ondrej Certik wrote:
> On Tue, Feb 24, 2009 at 2:12 PM, Jason Grout
>  wrote:
>> Ondrej Certik wrote:
>>> On Tue, Feb 17, 2009 at 1:43 PM, Ondrej Certik  wrote:
 On Tue, Feb 17, 2009 at 1:39 PM, Carl Witty  wrote:
> On Feb 17, 1:09 pm, Jason Grout  wrote:
>> schmmd wrote:
>>> I don't seem to be able to pretty print in sage.  I remember doing
>>> this in class, but the pretty_print function gives the error "It looks
>>> like jsMath failed to set up properly (error code -7).  I will try to
>>> keep going, but it could get ugly." when I use it in the notebook
>>> through vmware or the notebook on one of the public web servers.  Am I
>>> doing anything wrong?  How can I, for example, print a matrix with
>>> latex formatting?
>> You are doing things correctly.  You just need to install some fonts.
>> See 
>> http://wiki.sagemath.org/faq#IgetanerrorfromjsMathorthemathsymbolsdon...
> Where does this error message come from?  How hard would it be to
> change it to refer to
> http://wiki.sagemath.org/faq#IgetanerrorfromjsMathorthemathsymbolsdon.27tlookrightwhendisplayinginthenotebook
> ?
>
> (I think this might be worth doing even if it requires patching
> jsMath.)
 I am getting the same error, so I followed up the wiki and I installed
 both jsmath-fonts and smath-fonts-sprite packages in Ubuntu, but the
 error still stays...
>>
>> Install the jsmath-image-fonts spkg (i.e., *sage* package, not ubuntu
>> package), and the error should go away...I think...
> 
> Ah -- I was stupid, yes, this fixes the problem! Thanks a lot!
> 
>> That said, I agree that the error message is annoying, though it's
>> probably annoying for a reason...
> 
> So maybe jsmath-image-fonts could be in Sage by default?
>

It's too big---something like 80MB unzipped (lots and lots and lots of 
little tiny image files; one for each character).

The error message should be changed, and we ought to distribute the 
fonts from the jsmath homepage with Sage, so that instead of an error 
message, there is a nice helpful link that says something like "to get 
much better fonts, click here and follow these instructions, or install 
the jsmath-image-fonts spkg"

Jason


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[sage-support] Re: Cannot pretty print in sage

2009-02-24 Thread leonardo parada
..can I do PDF for print in SAGE??

2009/2/24 Ondrej Certik 

>
> On Tue, Feb 24, 2009 at 2:12 PM, Jason Grout
>  wrote:
> >
> > Ondrej Certik wrote:
> >> On Tue, Feb 17, 2009 at 1:43 PM, Ondrej Certik 
> wrote:
> >>> On Tue, Feb 17, 2009 at 1:39 PM, Carl Witty 
> wrote:
>  On Feb 17, 1:09 pm, Jason Grout  wrote:
> > schmmd wrote:
> >> I don't seem to be able to pretty print in sage.  I remember doing
> >> this in class, but the pretty_print function gives the error "It
> looks
> >> like jsMath failed to set up properly (error code -7).  I will try
> to
> >> keep going, but it could get ugly." when I use it in the notebook
> >> through vmware or the notebook on one of the public web servers.  Am
> I
> >> doing anything wrong?  How can I, for example, print a matrix with
> >> latex formatting?
> > You are doing things correctly.  You just need to install some fonts.
> > See
> http://wiki.sagemath.org/faq#IgetanerrorfromjsMathorthemathsymbolsdon...
>  Where does this error message come from?  How hard would it be to
>  change it to refer to
> 
> http://wiki.sagemath.org/faq#IgetanerrorfromjsMathorthemathsymbolsdon.27tlookrightwhendisplayinginthenotebook
>  ?
> 
>  (I think this might be worth doing even if it requires patching
>  jsMath.)
> >>> I am getting the same error, so I followed up the wiki and I installed
> >>> both jsmath-fonts and smath-fonts-sprite packages in Ubuntu, but the
> >>> error still stays...
> >
> >
> > Install the jsmath-image-fonts spkg (i.e., *sage* package, not ubuntu
> > package), and the error should go away...I think...
>
> Ah -- I was stupid, yes, this fixes the problem! Thanks a lot!
>
> >
> > That said, I agree that the error message is annoying, though it's
> > probably annoying for a reason...
>
> So maybe jsmath-image-fonts could be in Sage by default?
>
> Ondrej
>
> >
>


-- 
Leonardo Parada
Licenciado en Ingenieria Acustica
Ingeniero en Acustica (c)
http://leonardoparada.cl

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[sage-support] Re: Cannot pretty print in sage

2009-02-24 Thread Ondrej Certik

On Tue, Feb 24, 2009 at 2:12 PM, Jason Grout
 wrote:
>
> Ondrej Certik wrote:
>> On Tue, Feb 17, 2009 at 1:43 PM, Ondrej Certik  wrote:
>>> On Tue, Feb 17, 2009 at 1:39 PM, Carl Witty  wrote:
 On Feb 17, 1:09 pm, Jason Grout  wrote:
> schmmd wrote:
>> I don't seem to be able to pretty print in sage.  I remember doing
>> this in class, but the pretty_print function gives the error "It looks
>> like jsMath failed to set up properly (error code -7).  I will try to
>> keep going, but it could get ugly." when I use it in the notebook
>> through vmware or the notebook on one of the public web servers.  Am I
>> doing anything wrong?  How can I, for example, print a matrix with
>> latex formatting?
> You are doing things correctly.  You just need to install some fonts.
> See 
> http://wiki.sagemath.org/faq#IgetanerrorfromjsMathorthemathsymbolsdon...
 Where does this error message come from?  How hard would it be to
 change it to refer to
 http://wiki.sagemath.org/faq#IgetanerrorfromjsMathorthemathsymbolsdon.27tlookrightwhendisplayinginthenotebook
 ?

 (I think this might be worth doing even if it requires patching
 jsMath.)
>>> I am getting the same error, so I followed up the wiki and I installed
>>> both jsmath-fonts and smath-fonts-sprite packages in Ubuntu, but the
>>> error still stays...
>
>
> Install the jsmath-image-fonts spkg (i.e., *sage* package, not ubuntu
> package), and the error should go away...I think...

Ah -- I was stupid, yes, this fixes the problem! Thanks a lot!

>
> That said, I agree that the error message is annoying, though it's
> probably annoying for a reason...

So maybe jsmath-image-fonts could be in Sage by default?

Ondrej

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[sage-support] Re: Cannot pretty print in sage

2009-02-24 Thread Jason Grout

Ondrej Certik wrote:
> On Tue, Feb 17, 2009 at 1:43 PM, Ondrej Certik  wrote:
>> On Tue, Feb 17, 2009 at 1:39 PM, Carl Witty  wrote:
>>> On Feb 17, 1:09 pm, Jason Grout  wrote:
 schmmd wrote:
> I don't seem to be able to pretty print in sage.  I remember doing
> this in class, but the pretty_print function gives the error "It looks
> like jsMath failed to set up properly (error code -7).  I will try to
> keep going, but it could get ugly." when I use it in the notebook
> through vmware or the notebook on one of the public web servers.  Am I
> doing anything wrong?  How can I, for example, print a matrix with
> latex formatting?
 You are doing things correctly.  You just need to install some fonts.
 See 
 http://wiki.sagemath.org/faq#IgetanerrorfromjsMathorthemathsymbolsdon...
>>> Where does this error message come from?  How hard would it be to
>>> change it to refer to
>>> http://wiki.sagemath.org/faq#IgetanerrorfromjsMathorthemathsymbolsdon.27tlookrightwhendisplayinginthenotebook
>>> ?
>>>
>>> (I think this might be worth doing even if it requires patching
>>> jsMath.)
>> I am getting the same error, so I followed up the wiki and I installed
>> both jsmath-fonts and smath-fonts-sprite packages in Ubuntu, but the
>> error still stays...


Install the jsmath-image-fonts spkg (i.e., *sage* package, not ubuntu 
package), and the error should go away...I think...

That said, I agree that the error message is annoying, though it's 
probably annoying for a reason...

Jason


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[sage-support] Re: Cannot pretty print in sage

2009-02-24 Thread Ondrej Certik

On Tue, Feb 17, 2009 at 1:43 PM, Ondrej Certik  wrote:
> On Tue, Feb 17, 2009 at 1:39 PM, Carl Witty  wrote:
>>
>> On Feb 17, 1:09 pm, Jason Grout  wrote:
>>> schmmd wrote:
>>> > I don't seem to be able to pretty print in sage.  I remember doing
>>> > this in class, but the pretty_print function gives the error "It looks
>>> > like jsMath failed to set up properly (error code -7).  I will try to
>>> > keep going, but it could get ugly." when I use it in the notebook
>>> > through vmware or the notebook on one of the public web servers.  Am I
>>> > doing anything wrong?  How can I, for example, print a matrix with
>>> > latex formatting?
>>>
>>> You are doing things correctly.  You just need to install some fonts.
>>> See http://wiki.sagemath.org/faq#IgetanerrorfromjsMathorthemathsymbolsdon...
>>
>> Where does this error message come from?  How hard would it be to
>> change it to refer to
>> http://wiki.sagemath.org/faq#IgetanerrorfromjsMathorthemathsymbolsdon.27tlookrightwhendisplayinginthenotebook
>> ?
>>
>> (I think this might be worth doing even if it requires patching
>> jsMath.)
>
> I am getting the same error, so I followed up the wiki and I installed
> both jsmath-fonts and smath-fonts-sprite packages in Ubuntu, but the
> error still stays...

I think this error is very annoying, as I am getting it on basically
all computers where I tried it.

When I get some time, I'll try to figure out how to patch jsmath not
to show this message at all.

Ondrej

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[sage-support] Re: polynomial coercion bug?

2009-02-24 Thread Alex Raichev

Thanks for your clarification and help, Carl.

Alex

On Feb 24, 5:15 pm, Carl Witty  wrote:
> On Feb 23, 7:57 pm, Carl Witty  wrote:
>
> > On Feb 23, 6:54 pm, Alex Raichev  wrote:
>
> > > Carl, regarding the parenthetical remark of your first reply, are you
> > > saying the coercion error for plain old monomials below is supposed to
> > > happen?
>
> > Well, I wouldn't say "supposed to happen" because I don't think this
> > is the way it should stay long-term.  But yes, it's expected; that
> > functionality is not yet implemented.
>
> I've posted a wishlist request for coercions from number fields with
> embedding into QQbar.
>
> http://trac.sagemath.org/sage_trac/ticket/5355
>
> Carl
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[sage-support] Re: block matrix viewing

2009-02-24 Thread John H Palmieri

On Feb 24, 9:56 am, kcrisman  wrote:
> This is # 5359 now.
>
> By the way, the trac update is nice - love the "Draft" background!
>
> - kcrisman

I posted a partial patch, but I don't know how to fix this in the
notebook: the "right way" to do it is to use \hline where you want a
horizontal line, but jsmath doesn't know about the \hline command.
jsmath also seems to ignore the vertical lines in the array
definition. Any ideas about what to do instead?

  John


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[sage-support] Re: sws vs pdf

2009-02-24 Thread kcrisman


>
> I would personally be fine with downloading *never* including the
> revision history?  That would keep the interface simple.
>
> Would anybody not like that?

-1

I could imagine a situation (e.g. for grading purposes, or recovering
accidentally deleted things on a worksheet previously downloaded) when
having the various revisions available to someone else would be pretty
useful, actually.

I'm not contradicting myself; it's just not so great having w/
revisions be the default mode.

- kcrisman
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[sage-support] Re: sws vs pdf

2009-02-24 Thread William Stein

On Tue, Feb 24, 2009 at 10:01 AM, kcrisman  wrote:
>
>
>
> On Feb 24, 12:38 pm, Burcin Erocal  wrote:
>> On Tue, 24 Feb 2009 09:21:47 -0800 (PST)
>>
>>
>>
>> mabshoff  wrote:
>>
>> > On Feb 24, 9:17 am, kcrisman  wrote:
>>
>> > Hi,
>>
>> > > Just a last followup (ignoring the efficiency issues):
>>
>> > > Would it be possible to add a "Download Latest Revision Only" option
>> > > under "File..."  or "Download Text File Only" or something like that
>> > > (which would still be accepted as an upload, of course)?  Even when
>> > > one clicks "Text", it still prints as the actual output view, which
>> > > isn't the same.  Presumably this option would simply save
>> > > worksheet.txt to the local disk.
>>
>> > > That would be MUCH better for most ordinary purposes that don't need
>> > > the umpteen revisions history when sharing, especially since it's a
>> > > bit difficult to share from one's personal computer to the rest of
>> > > the world when one's computer is offline :)
>>
>> > > If this seems amenable, I will open a ticket for it.
>>
>> > +1 - please open an enhancement ticket.
>>
>> It's already #4404.
>>
>
> Thx.  By the way, I will modify this ticket to add a third possible
> option for discussion, to download just worksheet.txt (as opposed to
> the bzipped version), since some people only use Sage via the server
> and cutting and pasting a long text thing is difficult using the
> current "Text" button.
>

I would personally be fine with downloading *never* including the
revision history?  That would keep the interface simple.

Would anybody not like that?

 -- William

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[sage-support] ideals of points

2009-02-24 Thread davidp

Hi,

I have the following homogeneous Singular ideal defining a finite set
of points in projective space.  I would like to get numerical
approximations for these points.

sage: S.ring()

//   characteristic : 0
//   number of vars : 4
//block   1 : ordering dp
//  : namesx_3 x_2 x_1 x_0
//block   2 : ordering C
sage: S.ideal()

x_1^3-x_3*x_2*x_0,
x_3*x_2*x_1-x_0^3,
x_2^3-x_3*x_1*x_0,
x_3^3-x_2*x_1*x_0,
x_2^2*x_1^2-x_3^2*x_0^2,
x_3^2*x_1^2-x_2^2*x_0^2,
x_3^2*x_2^2-x_1^2*x_0^2
sage: type(S.ideal())


One way to go might be to map to a new ring, setting x_0 = 1, then use
the nice Singular algorithm for finding the solutions:

http://www.singular.uni-kl.de/Manual/3-0-4/sing_582.htm

I couldn't figure out how to get the Singular "map" function to work
with Sage, so I just converted equations using string commands (saved
in "y" in the following code) then tried:

sage: R = singular.ring(0,'(x_3,x_2,x_1)','lp')
sage: J = singular.ideal(y)
sage: J

-x_3*x_2+x_1^3,
x_3*x_2*x_1-1,
-x_3*x_1+x_2^3,
x_3^3-x_2*x_1,
-x_3^2+x_2^2*x_1^2,
x_3^2*x_1^2-x_2^2,
x_3^2*x_2^2-x_1^2
sage: K = J.groebner()
sage: M = K.solve(10,1)

I'm not sure where to go from there.  Of course, I might be taking the
wrong approach altogether.

Any advice would be appreciated.

Thanks,
Dave

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[sage-support] Re: block matrix viewing

2009-02-24 Thread kcrisman

This is # 5359 now.

By the way, the trac update is nice - love the "Draft" background!

- kcrisman
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[sage-support] Re: sws vs pdf

2009-02-24 Thread kcrisman



On Feb 24, 12:38 pm, Burcin Erocal  wrote:
> On Tue, 24 Feb 2009 09:21:47 -0800 (PST)
>
>
>
> mabshoff  wrote:
>
> > On Feb 24, 9:17 am, kcrisman  wrote:
>
> > Hi,
>
> > > Just a last followup (ignoring the efficiency issues):
>
> > > Would it be possible to add a "Download Latest Revision Only" option
> > > under "File..."  or "Download Text File Only" or something like that
> > > (which would still be accepted as an upload, of course)?  Even when
> > > one clicks "Text", it still prints as the actual output view, which
> > > isn't the same.  Presumably this option would simply save
> > > worksheet.txt to the local disk.
>
> > > That would be MUCH better for most ordinary purposes that don't need
> > > the umpteen revisions history when sharing, especially since it's a
> > > bit difficult to share from one's personal computer to the rest of
> > > the world when one's computer is offline :)
>
> > > If this seems amenable, I will open a ticket for it.
>
> > +1 - please open an enhancement ticket.
>
> It's already #4404.
>

Thx.  By the way, I will modify this ticket to add a third possible
option for discussion, to download just worksheet.txt (as opposed to
the bzipped version), since some people only use Sage via the server
and cutting and pasting a long text thing is difficult using the
current "Text" button.

- kcrisman
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[sage-support] Re: sws vs pdf

2009-02-24 Thread Burcin Erocal

On Tue, 24 Feb 2009 09:21:47 -0800 (PST)
mabshoff  wrote:

> 
> 
> 
> On Feb 24, 9:17 am, kcrisman  wrote:
> 
> Hi,
> 
> > Just a last followup (ignoring the efficiency issues):
> >
> > Would it be possible to add a "Download Latest Revision Only" option
> > under "File..."  or "Download Text File Only" or something like that
> > (which would still be accepted as an upload, of course)?  Even when
> > one clicks "Text", it still prints as the actual output view, which
> > isn't the same.  Presumably this option would simply save
> > worksheet.txt to the local disk.
> >
> > That would be MUCH better for most ordinary purposes that don't need
> > the umpteen revisions history when sharing, especially since it's a
> > bit difficult to share from one's personal computer to the rest of
> > the world when one's computer is offline :)
> >
> > If this seems amenable, I will open a ticket for it.
> 
> +1 - please open an enhancement ticket.

It's already #4404.


Cheers,

Burcin

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[sage-support] Re: sws vs pdf

2009-02-24 Thread mabshoff



On Feb 24, 9:17 am, kcrisman  wrote:

Hi,

> Just a last followup (ignoring the efficiency issues):
>
> Would it be possible to add a "Download Latest Revision Only" option
> under "File..."  or "Download Text File Only" or something like that
> (which would still be accepted as an upload, of course)?  Even when
> one clicks "Text", it still prints as the actual output view, which
> isn't the same.  Presumably this option would simply save
> worksheet.txt to the local disk.
>
> That would be MUCH better for most ordinary purposes that don't need
> the umpteen revisions history when sharing, especially since it's a
> bit difficult to share from one's personal computer to the rest of the
> world when one's computer is offline :)
>
> If this seems amenable, I will open a ticket for it.

+1 - please open an enhancement ticket.

> - kcrisman

Cheers,

Michael
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[sage-support] Re: block matrix viewing

2009-02-24 Thread mabshoff



On Feb 24, 9:11 am, kcrisman  wrote:
> Bump.  Again, I'd be happy to open a ticket but first would like
> confirmation that this is, in fact, a bug, and not desired
> functionality.
>
> - kcrisman

Looks like a bug to me. Please open a ticket.

Cheers,

Michael
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[sage-support] Re: sws vs pdf

2009-02-24 Thread kcrisman

Just a last followup (ignoring the efficiency issues):

Would it be possible to add a "Download Latest Revision Only" option
under "File..."  or "Download Text File Only" or something like that
(which would still be accepted as an upload, of course)?  Even when
one clicks "Text", it still prints as the actual output view, which
isn't the same.  Presumably this option would simply save
worksheet.txt to the local disk.

That would be MUCH better for most ordinary purposes that don't need
the umpteen revisions history when sharing, especially since it's a
bit difficult to share from one's personal computer to the rest of the
world when one's computer is offline :)

If this seems amenable, I will open a ticket for it.
- kcrisman
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[sage-support] Re: block matrix viewing

2009-02-24 Thread kcrisman

Bump.  Again, I'd be happy to open a ticket but first would like
confirmation that this is, in fact, a bug, and not desired
functionality.

- kcrisman

On Feb 17, 2:56 pm, kcrisman  wrote:
> Dear Support,
>
> Viewing block matrices "nicely" seems to be difficult in Sage.
>
> sage: A=matrix([[1]])
> sage: B=matrix([[2]])
> sage: C=matrix([[3]])
> sage: D=matrix([[4]])
> sage: BM=block_matrix([A,B,C,D])
> sage: BM
>
> [1|2]
> [-+-]
> [3|4]
>
> Okay, this is fine but a little clunky.  Let's try something nicer:
> sage: show(BM)
> Upon which a dvi viewer opens up, unfortunately not a very nice one...
> and shows the block matrix with only a vertical dividing line, not a
> horizontal one!
>
> Okay, let's try the notebook:
> {{{id=0|
> A=matrix([[1]])
> B=matrix([[2]])
> C=matrix([[3]])
> D=matrix([[4]])
> ///
>
> }}}
>
> {{{id=1|
> BM=block_matrix([A,B,C,D]);BM
> ///
>
> [1|2]
> [-+-]
> [3|4]}}}
>
> So far so good, but when I click "Typeset" to get a LaTeXed matrix...
>
> {{{id=1|
> BM=block_matrix([A,B,C,D]);BM
> ///
>
> \left(\begin{array}{r|r}
> 1 & 2 \\
> 3 & 4
> \end{array}\right)
>
> }}}
>
> Which as you can see does NOT have any "blockiness" to it at all.
> Very pretty, but not a block matrix, at least not identifiably so.
>
> But is this a bug?  I'm not sure, as there might be good reasons for
> these viewing options I am not aware of.  If it is, I'll be happy to
> post a trac ticket.
>
> Thanks,
> - kcrisman
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[sage-support] Re: Sage 3.3 released [pynac webpage]

2009-02-24 Thread William Stein

On Tue, Feb 24, 2009 at 4:09 AM, David Joyner  wrote:
>
> On Tue, Feb 24, 2009 at 2:41 AM, William Stein  wrote:
>>
>
>>
>> I am going to make
>>
>>http://pynac.sagemath.org/
>>
>> the official website for pynac.  Right now it is just a trivial
>> 1-minute webpage I made...
>
> I don't seem to be able to access it at all now.
>

I added it to my DNS account but for some reason it hasn't been pushed
out yet by godaddy.com.  :-(

William

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[sage-support] Re: Sage 3.3 released [pynac webpage]

2009-02-24 Thread David Joyner

On Tue, Feb 24, 2009 at 2:41 AM, William Stein  wrote:
>

>
> I am going to make
>
>    http://pynac.sagemath.org/
>
> the official website for pynac.  Right now it is just a trivial
> 1-minute webpage I made...

I don't seem to be able to access it at all now.

>
> William
>
> >
>

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