It's a good point that for most work you don't type in matrices by
hand. What is more useful is probably various ways of inspecting
matrices easily (print submatrices, plot the sparsity pattern,
evaluate expressions involving the matrix, etc.)
On 20 Aug., 00:21, Simon King wrote:
> On 19 Aug., 2
On Aug 19, 9:07 pm, Benjamin Jones wrote:
> Woops. That might have been me pasting:
>
> while True:
> os.fork()
>
> into the textbox on your homepage, Rob. Sorry..
A couple of nice things about the singlecell *service* are that
(a) the computations are done on sagemath.org
and
(b) when J
I'm trying to compute some eigenspaces for matrices over number
fields, mostly because I can, in order to build some doctests.
Eigenspace routine uses the root_field() method on an irreducible
factor of a characteristic polynomial to create a field containing
eigenvalues. Then the routine tries to
On 8/19/11 11:07 PM, Benjamin Jones wrote:
On Fri, Aug 19, 2011 at 11:00 PM, Rob Beezer wrote:
On Aug 19, 7:56 pm, Jason Grout wrote:
To whet your appetite, though, I took the example Rob Beezer
now has on his front page:
http://buzzard.ups.edu/
Thanks, Jason, for slash-dotting my site whe
On Fri, Aug 19, 2011 at 11:00 PM, Rob Beezer wrote:
> On Aug 19, 7:56 pm, Jason Grout wrote:
>> To whet your appetite, though, I took the example Rob Beezer
>> now has on his front page:
>>
>> http://buzzard.ups.edu/
>
> Thanks, Jason, for slash-dotting my site when my students are all
> looking
On Aug 19, 7:56 pm, Jason Grout wrote:
> To whet your appetite, though, I took the example Rob Beezer
> now has on his front page:
>
> http://buzzard.ups.edu/
Thanks, Jason, for slash-dotting my site when my students are all
looking for their reading assignments on a Friday night, a week before
c
On Fri, Aug 19, 2011 at 9:56 PM, Jason Grout
wrote:
> As soon as things slow down a bit, Alex Kramer or I will document some of
> the new things that Ira, Alex, and I did with interacts over the summer. To
> whet your appetite, though, I took the example Rob Beezer now has on his
> front page:
>
On Fri, Aug 19, 2011 at 4:22 PM, Ivo Hedtke wrote:
> Hi,
>
> What is the current status of sage on Lion?
My understanding is that basically nobody knows how to build Maxima
(on top of ECL) on Lion yet, but everything else is fine.
Incidentally, that's also exactly the current status of Sage on L
As soon as things slow down a bit, Alex Kramer or I will document some
of the new things that Ira, Alex, and I did with interacts over the
summer. To whet your appetite, though, I took the example Rob Beezer
now has on his front page:
http://buzzard.ups.edu/
and made it work with any of the
On 8/19/11 5:21 PM, Simon King wrote:
The line break replaces the semicolon, hence, the example that you
give corresponds to [1,2,;3,4] (which hopefully is a syntax error in
Matlab), while the second version becomes [1,2;3,4] (which seems to be
the matlab idea of a matrix).
Again, matlab is (s
Hi,
What is the current status of sage on Lion?
Ivo.
Am 25.07.2011 um 05:10 schrieb Justin C. Walker:
>
> On Jul 24, 2011, at 15:30 , Dima Pasechnik wrote:
>
>> well, indeed, it would perhaps make sense to try to add the corresponding
>> library regardless of the compiler...
>
> I kind of s
On Fri, Aug 19, 2011 at 3:21 PM, Simon King wrote:
> On 19 Aug., 21:26, Jason Grout wrote:
>> But then what about:
>>
>> [1, 2,
>> 3, 4]
>
> Note the small difference:
> [1,2,
> 3,4]
> is a list in Python. But
> [1,2
> 3,4]
> (if I am not mistaken) is a syntax error in Python, and thus the
> prep
On Fri, Aug 19, 2011 at 2:25 PM, Nils Bruin wrote:
> On Aug 19, 12:26 pm, Jason Grout wrote:
>> On 8/19/11 1:45 PM, Robert Bradshaw wrote:
>>
>> > [a, b; c, d].change_ring(QQ)
>
> You'd have to take care that
>
> [1.0001, 1.0; 2.0,
> 3.0].change_ring(RealField(100))
>
> d
On 19 Aug., 21:26, Jason Grout wrote:
> But then what about:
>
> [1, 2,
> 3, 4]
Note the small difference:
[1,2,
3,4]
is a list in Python. But
[1,2
3,4]
(if I am not mistaken) is a syntax error in Python, and thus the
preparser could preprocess it and turn it into a matrix:
The line break replac
On 8/19/11 4:25 PM, Nils Bruin wrote:
In analogy to (a,) being a singleton, this should probably be
[a,b,c,d;]
Interesting. In python, this is often stated as "the comma operator
makes a tuple, not the parentheses". So we're saying that the semicolon
is what makes a matrix. Interesting. S
On 8/19/11 3:59 PM, William Stein wrote:
On Fri, Aug 19, 2011 at 1:50 PM, Volker Braun wrote:
For the 1-row matrix case, how about
[1, 2, 3, 4; ]
This is similar to the one-element tuple (1,) in Python.
I like that.
Interestingly, it works in MATLAB, but not in PARI.
It makes sense to work
On Aug 19, 12:26 pm, Jason Grout wrote:
> On 8/19/11 1:45 PM, Robert Bradshaw wrote:
>
> > [a, b; c, d].change_ring(QQ)
You'd have to take care that
[1.0001, 1.0; 2.0,
3.0].change_ring(RealField(100))
doesn't lose precision on the way, which suggests that "[;]" syntax
s
Hi,
I have problems with it.
I click on "Login" and use my username and password from trac. That works.
But if I click on a link, say "Settings", I am not logged in anymore: "You must
login to use this action: userprefs."
Ivo.
Am 19.08.2011 um 22:09 schrieb William Stein:
> Hi,
>
> We have
On Fri, Aug 19, 2011 at 1:50 PM, Volker Braun wrote:
> For the 1-row matrix case, how about
> [1, 2, 3, 4; ]
> This is similar to the one-element tuple (1,) in Python.
I like that.
Interestingly, it works in MATLAB, but not in PARI.
William
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For the 1-row matrix case, how about
[1, 2, 3, 4; ]
This is similar to the one-element tuple (1,) in Python.
--
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To unsubscribe from this group, send an email to
sage-devel+unsubscr...@googlegroups.com
For more options, visit t
Hi,
We have changed how accounts work for http://wiki.sagemath.org.
To access the wiki, use your trac account. Your old wiki account *will
not work*. See http://trac.sagemath.org/sage_trac/ for how to get a
trac account. (Spammers: Please don't waste your time trying to get an
account, since yo
On 8/19/11 1:45 PM, Robert Bradshaw wrote:
[a, b; c, d].change_ring(QQ)
What if I want a 1-row matrix. Will this work?
[a,b,c,d]
Of course, this will be a problem since that is valid list syntax. For
that reason, it seems more consistent that the semicolon is a shortcut
for doubly-ne
On Fri, Aug 19, 2011 at 6:29 AM, Pedro Cruz wrote:
>
> I am creating a new package in python separated from Sage tree (following
> [1]) but depends entirely on Sage Math library (and also on Sage Notebook),
> However
> sage -t somemodule.py
> is not working because of imports. ==> But using thi
> More on topic, I strongly agree with the sentiments that we are trying
> to create a viable alternative, not a clone. Sage does lack a concise
> syntax for matrices which are a pretty basic type, and I think this
> deficiency is probably worth addressing with the preparser. The [a, b;
> c, d] syn
For the record, Maple also provides a specialized matrix/vector constructor
<1,2,3> = column vector, <1|2|3> = row vector and nested <> brackets created
matrices by gluing vectors together, so
<<1,2>|<3,4>> = transpose( <<1|3>,<2|4>>)
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To post to this group, send an email to sage-devel@goo
On Fri, Aug 19, 2011 at 5:27 AM, leif wrote:
> On 19 Aug., 12:12, Harald Schilly wrote:
>> On Friday, August 19, 2011 12:02:14 PM UTC+2, leif wrote:
>>
>> > It shouldn't be that hard to implement functions which at least
>> > partially translate MATLAB / Mma / whatever syntax (passed as a
>> > st
On Fri, 2011-08-19 at 05:27 -0700, leif wrote:
> ___
> * I vaguely remember to have once seen some [quite old?] list / table
> mapping Mma function names to Sage's, but I'm not aware it is part of
> the Sage distribution or prominently advertised. I may be wrong of
> course.
I am creating a new package in python separated from Sage tree (following
[1]) but depends entirely on Sage Math library (and also on Sage Notebook),
However
sage -t somemodule.py
is not working because of imports. ==> But using this package normally
causes no problems with imports!
I'm f
On Fri, Aug 19, 2011 at 14:27, leif wrote:
> I didn't have a fully-fledged compiler (or clone) in mind …
ok, good ;)
About your tutorials and documentation ideas, I think what could help
at least for the start is to mention the respective function in the
documentation. Then, when someone searche
On 8/19/11 2:55 AM, Johan S. R. Nielsen wrote:
On the other hand, I think it would of course think it would be great
if all functionality needed for numerics people would be readily
available in Sage.
Since we rely so much on numpy/scipy for this stuff, maybe we could
continue to invite some o
On 8/19/11 4:54 AM, dahl.joac...@gmail.com wrote:
Personally I don't mind that the syntax is different.
I was about to give some examples of indexing and slicing
of Numpy arrays, which I remembered to be odd for matrices, but
then I realized that the indexing/slicing works exactly like
I expect
On 19 Aug., 12:12, Harald Schilly wrote:
> On Friday, August 19, 2011 12:02:14 PM UTC+2, leif wrote:
>
> > It shouldn't be that hard to implement functions which at least
> > partially translate MATLAB / Mma / whatever syntax (passed as a
> > string, or from a file) to corresponding Sage expressio
On Friday, August 19, 2011 12:02:14 PM UTC+2, leif wrote:
>
>
> It shouldn't be that hard to implement functions which at least
> partially translate MATLAB / Mma / whatever syntax (passed as a
> string, or from a file) to corresponding Sage expressions and
> commands, analoguous to preparse().
Hi, I also studied numerical mathematics and I completely agree on you:
On Friday, August 19, 2011 9:55:58 AM UTC+2, Johan S. R. Nielsen wrote:
>
> that's a very small syntax price to pay for …
>
I would also say that this is not the point at all. Parsing a string
representing a matrix should be
On 19 Aug., 09:55, "Johan S. R. Nielsen"
wrote:
> However, I really don't believe that the current matrix-construction
> syntax is what is seriously keeping Matlab people away from Sage --
> and if it is, then that's simply silly! Comparing
>
> M = [1 2;
> 3 4;
> 5 6]
>
> with
>
> M = ma
Personally I don't mind that the syntax is different.
I was about to give some examples of indexing and slicing
of Numpy arrays, which I remembered to be odd for matrices, but
then I realized that the indexing/slicing works exactly like
I expect it to, e.g.,
>>> A[:, i]
picks out the i'th column
>
> Seems this thread *has* been hijacked. ;-)
Just want to add my opinion, which belongs in some void between the
original thread and the hijacked one ;-)
I am a ph.d. student in algebra, but have a background in computer
science. I don't do much numerics anymore, so I'm not exactly the
right p
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