Success!
sage: G = graphs.GridGraph([100,100])
sage: L = G.laplacian_matrix()
sage: L
1 x 1 sparse matrix over Integer Ring
sage: sage: time M = L[1:]
CPU times: user 21.98 s, sys: 0.01 s, total: 21.99 s
Wall time: 22.93 s
sage: sage: time N = L._delete_row_(0)
CPU times: user 0.01 s,
On Tue, Jun 2, 2009 at 10:10 PM, davidp wrote:
>
> I might be going down the wrong path, but is seems like I would want
> to add a
>
> copy_mpz_vector_init
>
> function to vector_integer_sparse_c.pxi that would make a copy of an
> mpz_vector. Is that overkill?
That sounds like a good i
I might be going down the wrong path, but is seems like I would want
to add a
copy_mpz_vector_init
function to vector_integer_sparse_c.pxi that would make a copy of an
mpz_vector. Is that overkill?
My first idea was to use add_mpz_vector_init(sum, v, w, mul), which
sets sum equal to
On Tue, Jun 2, 2009 at 8:45 PM, davidp wrote:
>
> I can't figure out how to create a new sparse matrix (see below).
>
> Sorry,
> Dave
You can make a new matrix with the analogous parent but a different
shape using the new_matrix method.
sage: a = random_matrix(ZZ,3,4,sparse=True)
sage: a.new_ma
I can't figure out how to create a new sparse matrix (see below).
Sorry,
Dave
M = Matrix_integer_sparse.__new__(Matrix_integer_sparse,
sage.matrix.matrix_space.MatrixSpace(ZZ, self._nrows-1, self._ncols,
sparse=True), None, None, None)
---
...
def _delete_row_(self, Py_ssiz
William Stein wrote:
> On Tue, Jun 2, 2009 at 7:22 PM, davidp wrote:
>> I tried adding a delete_row method to matrix_integer_sparse.pyx but
>> stopped after getting the error message:
>
> Just def your method -- do not cpdef it. You can still use Cython
> code in a cpdef's method and it will be
I would like to run the doctests in my file, "sandpile.sage", but get
the following error message:
++===
xyzzy> sage -t sandpile.sage
sage -t "sandpile.sage"
/usr/local/sage-devel/local/bin/sage-preparse: File file_name is
missing
Traceback (most recent call last)
On Tue, Jun 2, 2009 at 7:22 PM, davidp wrote:
>
> I tried adding a delete_row method to matrix_integer_sparse.pyx but
> stopped after getting the error message:
Just def your method -- do not cpdef it. You can still use Cython
code in a cpdef's method and it will be just as fast.
Make sure tha
I tried adding a delete_row method to matrix_integer_sparse.pyx but
stopped after getting the error message:
+
Error converting Pyrex file to C:
...
add_mpz_vec
William Stein wrote:
> On Mon, Jun 1, 2009 at 5:16 PM, davidp wrote:
>> Is there a fast way to create a submatrix?
>>
>> -
>>
>>
>> sage: version()
>> 'Sage Version 4.0.alpha0, Release Date: 2009-05-15'
>> sage: G = graphs.GridGraph([100,100])
>> sa
littlemathteacher wrote:
> Dear supporters,
>
> again thanks for the great support.
>
> One thing I am missing (or simply not understanding) is 3dplotting
> without automatically scaled up range of the function value.
>
> (This is just my first example at hand and surely not a good one:
> y, x
I made a mistake in the example. The correct example is:
f=function("f",x)
a=integrate(f,x,0,1)
show(a)
I have been doing some other tests, and all math symbols seem to be
gone, square roots for example.
Regards
Ricardo
On 2 jun, 16:55, richi wrote:
> I had installed sage 3.4.1 in my Ubuntu m
I had installed sage 3.4.1 in my Ubuntu machine, and every time I did
something like:
f=function("f",x)
integrate(f,x,0,1)
in a notebook, sage showed me the equation using an integral symbol. I
just installed sage 4.0, and when I do the same, I get:
integrate(f(x), x, 0, 1)
no matter if I che
After installing ETS spkg, once someone knows what to do it seems very easily,
1) download from: agni.phys.iit.edu/~kmcivor/wxmpl/, Wxmpl version 1.3.1 which
is completely compatible with the matplotlib library comming with the ETS-3.1.1
spkg, in your $SAGE_ROOT/local/lib/python2.5/site-pack
Jorge E. ´Sanchez Sanchez wrote:
> Hi all,
> I was a little dissappointed when I discover after accomplished to install
> the ETS spkg to work, in my Ubuntu 9.04 athlon x86_64 computer, that although
> it has mayavi2 and chaco working in all is beautifullness, it has not the
> render for pylab
Hi all,
I was a little dissappointed when I discover after accomplished to install the
ETS spkg to work, in my Ubuntu 9.04 athlon x86_64 computer, that although it
has mayavi2 and chaco working in all is beautifullness, it has not the render
for pylab (matplotlib). Because all my 2-D graphs ar
Thanks Kiran, I think snapshots were indeed part of the problem. I
have been running that server since early 2007, with multiple grad
students, and it had a ridiculous number of snapshot files. I think
I've deleted about 1 GB so far.
-Marshall
On May 30, 3:24 pm, Kiran Kedlaya wrote:
> Follow
On Tue, Jun 2, 2009 at 11:26 AM, William Stein wrote:
>
> On Tue, Jun 2, 2009 at 10:15 AM, VictorMiller wrote:
>>
>> In converting some of my old python programs to run on SAGE I
>> expressions like:
>>
>> 0.5**numpy.arange(10,1,-1)
>>
>> which works fine in python, but gives a type error in SAG
On Tue, Jun 2, 2009 at 10:15 AM, VictorMiller wrote:
>
> In converting some of my old python programs to run on SAGE I
> expressions like:
>
> 0.5**numpy.arange(10,1,-1)
>
> which works fine in python, but gives a type error in SAGE. I
> eventually figured out that I could
> get this to work by
In converting some of my old python programs to run on SAGE I
expressions like:
0.5**numpy.arange(10,1,-1)
which works fine in python, but gives a type error in SAGE. I
eventually figured out that I could
get this to work by doing
float(0.5)**numpy.arange(10,1,-1)
but that's a pain. Any chan
Actually, Sage's 2d plotting has a similar problem, though for
different reasons; see http://trac.sagemath.org/sage_trac/ticket/3985
. I believe that in both cases, though, there could be improvement of
"automatic" detecting of the "right" values.
That said, you may want to try something using t
Sorry, me again.
Maybe I was wrong to say Sage scales "up". Maybe Sage scales "down".
Howto aviod this?
Thanks
On 2 Jun., 08:44, littlemathteacher wrote:
> Dear supporters,
>
> again thanks for the great support.
>
> One thing I am missing (or simply not understanding) is 3dplotting
> without
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