On 5/18/07, Sara Billey wrote:
> As I was getting acquainted with SAGE this morning I made some notes
> on my wish list and issues that came up. The last one is probably
> most useful to you. I thought I would pass them all along just in
> case they are useful. I don't mean to be demanding answers about
> free software.
Thanks!
> Thanks again for the demo! I am very impressed with all the work
> that you and the SAGE team have done.
>
> -Sara
>
> ********************************************************************
> How do I get a direct connection to my xemacs file for editing? I see
> there are emacs like keybindings available. That will be great when I
> get it going. (I wish I could just "click here" for that.)
I'm not quite sure exactly what you're asking for. Could you clarify?
One possibly useful thing you could do would be to edit the relevant
file in xemacs under windows, then paste it into the notebook edit
mode. Maybe I can come by and ask you for clarification. Perhaps
a better setup would be a file upload / update button -- then you
would edit the text version of the notebook under xemacs in windows,
and at the click of a button have it automatically get uploaded and
displayed in the notebook browser. This doesn't exist yet, but
would likely be very easy to implement.
> ********************************************************************
>
> I would like a direct way to turn my latex document into a sage
> document. In any equation mode, I want to be able to insert extra
> text which is commented out from the point of view of latex but which
> turns into an active equation in sage.
I very much want this too, and think I can do it via a combination
of latex2html and stuff already in SAGE. What format would you want for the
"insert extra text"? For example,
some math and words
\sage{
a = matrix(2,2, [1,2,3,4])
}
....
and in latex \sage would be defined to do nothing, but when parsed
by latex2html it would be output in a way that could be interpreted as
input to SAGE (i.e., an input cell in the notebook).
> ********************************************************************
> It would be nice if all the coxeter group stuff from gap was more
> readily apparent in sage. (Hmm, Brant Jones just told me this has
> been removed in the most recent version of GAP.)
Why was it removed?
> ********************************************************************
> I would like to get more specific information on making a matrix when I type
>
> search_doc("matrix")
>
> Oh, actually just not using the help function properly yet. The
> comman search_doc("matrix") was clearly not meant to be used by the
> novice.
Basically you should type "matrix?".
search_doc was written by me in 30 minutes to be "better than nothing".
One of the SAGE developers (alex clemesha) has a demo of something
much much better for browsing the help. Also the index in the reference
manual on the web page is somewhat useful.
> ********************************************************************
> Learning to use help:
>
> =?
>
> returns "No object " currectly defined
For any object x do
x.[tab]
to get all functions on x.
If foo is a function do foo? or x.foo? for help and x.foo?? for
the source code.
> ********************************************************************
> 2.3.2 Multivariate Polynomials (doc_browser_32)
>
> Sometimes I don't know in advance how many variables I will want.
> Do I have to declare the number of variables? Looks like I could do
>
> R = MPolynomialRing(R,300000,"z")
>
>
> Is there a way to get (z[1]+z[2])^2 to exand this just assuming we
> have commuting variables?
There is no way to have the number of variables grow at present -- you
just have to make a ring with lots of variables. However, if you do
R = MPolynomialRing(R,300000,"z")
z = R.gens()
Then z[0], z[1], etc. are the generators.
> ********************************************************************
>
> When I find a term I don't know in the SAGE documentation, I would
> like to be able to look it up easily using wikipedia or world of math.
> I see that highlighting the term and right clicking in the highlight
> box gives me an option to search google. However, I can't find the
> results of my search.
That's a great idea that nobody has ever suggested to me before --
thanks. I don't know where the search is vanishing to though...
you'll have to show me. Very interesting idea.
> ********************************************************************
>
> Being able to hide a computation or output is very handy. But, when
> I am just doing simple things, I like there to be output everytime.
> Do I need to say "show" each time or can I toggle some parameter to
> show everything unless I request to "hide" it?
>
The default is *always* to show everything. There are also buttons in the
upper right to hide all and show all output.
> ********************************************************************
>
> Ok, I tried to challenge SAGE a bit by doing
>
> v = [n^2 for n in range(0,10^8)]
>
> I got an error that that was too big, so I tried 10^7 and got the message
>
> "killed"
>
> seems I killed this sage session. Back in the vmware player I
> got the message
>
> Out of Memory for python, lisp.run, python two more times.
Thanks. Was this totally fatal? I will test this out.
By the way if you edit sage.vmx with a text editor you can increase
the amount of ram allocated to SAGE. (It gets 324MB by default, I
think -- it will never use more on your machine unless you tell it
that it can.)
William
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