31:56 CEST 2010
x86_64 Intel(R) Core(TM) i7 CPU Q 820 @ 1.73GHz GenuineIntel GNU/Linux
Mani
On Fri, Aug 13, 2010 at 9:18 PM, Jason Grout wrote:
> On 8/13/10 3:21 AM, Mani Chandra wrote:
>
>> Hi,
>>
>> The following example code does not work:
>>
>> plot(sin(x^2),
Hi,
The following example code does not work:
plot(sin(x^2), (x, -3, 3), axes_labels=['$x$','$y$'])
Traceback (click to the left of this block for traceback)
...
TypeError: coercing to Unicode: need string or buffer, dict found
But works when I remove the '$' symbo
Hi,
In the same context, how can I get the following to work?
A = matrix(SR, [[x, 1], [x**3, 4]])
A.eigenvectors_right()
__main__:1: UserWarning: Using generic algorithm for an inexact ring,
which may result in garbage from numerical precision issues.
__main__:1: UserWarning: Using generic algor
:
sage71 : integrate(sage67,sage68,sage69,sage70)$
Maxima ERROR:
Division by 0
What went wrong?
Thanks,
Mani chandra
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Mani chandra wrote:
> Hi,
>
> There seems to be some issue with "simplify" when used in the
> following manner:
>
> sage: var('x, a, b')
> (x, a, b)
> sage: x = a + I*b
> sage: x.conjugate()
> conjugate(a) - I*conjugate(b)
> sage: x.conju
why is SAGE giving out a - I*b
when I say x.conjugate().simplify() but conjugate(a) - I*conjugate(b)
when only x.conjugate() is called?
Thanks,
Mani chandra
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Minh Nguyen wrote:
> On Sun, Aug 23, 2009 at 12:16 AM, Mani chandra wrote:
>
>> Minh Nguyen wrote:
>>
>
> Ticket #6802 has been closed as a duplicate of #6559.
>
>
Hi,
Just wanted to ask, since you're the release manager for the next
release
Robert Bradshaw wrote:
> On Aug 22, 2009, at 3:13 AM, Mani chandra wrote:
>
>
>> Mani chandra wrote:
>>
>>> Hi,
>>>
>>> How does one define a variable in sage and make sure the it's
>>> conjugate is the
Minh Nguyen wrote:
> Hi Mani,
>
> On Sat, Aug 22, 2009 at 8:40 PM, Mani chandra wrote:
>
>> William Stein wrote:
>>
>>>
>>> sage: var('a')
>>> sage: a.conjugate()
>>> conjugate(a)
>>>
>>
>
> Unfortunately, I don't think this is implemented yet.
>
> -- William
>
>
Hi,
Can this be some sort of a feature request for the next release?
Thanking you,
Mani chandra
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Mani chandra wrote:
> Hi,
>
> How does one define a variable in sage and make sure the it's
> conjugate is the same as the variable itself?
>
> Thanks,
> Mani chandra
>
> >
>
>
Hi,
Perhaps I wasn't specific.
sage: var('a')
sage
Hi,
How does one define a variable in sage and make sure the it's
conjugate is the same as the variable itself?
Thanks,
Mani chandra
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Ondrej Certik wrote:
> On Mon, Aug 17, 2009 at 11:06 AM, William Stein wrote:
>
>> On Mon, Aug 17, 2009 at 6:27 AM, Mani chandra wrote:
>>
>>> William Stein wrote:
>>>
>>>> On Mon, Aug 17, 2009 at 2:26 AM, Juan Jose
>>>>
Hi,
Sage now runs fine when recompiled with a much larger memory limit
for maxima. (Passing the command through maxima() didn't work). Thanks
to everybody for helping out.
Regards,
Mani chandra
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6772
>
> -- William
>
> >
>
>
Hi,
I'm glad that this issue has finally been taken up. But as an interm
measure, how does one pass this command through a sage code? I tried
maxima.eval_String, but it doesn't seem to work.
In an unrelated note, I rewrote
Robert Dodier wrote:
> Mani chandra wrote:
>
>
>> I've attached the value of a particular func where it fails. But
>> this varies though. Also I restarted the code, making sure I evaluate
>> only the problematic part and it works. So, it must be an interna
Robert Dodier wrote:
> Mani chandra wrote:
>
>
>> Yes, the computation of the "select_mode" function does indeed
>> succeed for simple expressions. But if you run the code, you will notice
>> that it works for some modes which probably have more complic
William Stein wrote:
> On Sat, Aug 15, 2009 at 5:44 AM, Mani chandra wrote:
>
>> Hi,
>>
>>I wrote a code in sage to construct a Low Dimensional model for the
>> Magnetohydrodynamic equations to study dynamos etc... But the program
>> crashes at differe
Robert Dodier wrote:
> Mani chandra wrote:
>
>
>> def select_mode(func,l,m,n):
>> val = (func*exp(-I*(l*x + m*y +
>> n*z))).integrate(x,0,2*pi).integrate(y,0,2*pi).integrate(z,0,2*pi)
>> return val/(8*pi**3)
>>
>
> I guess l, m, and n
ion backend for SAGE is
Maxima, Pynac or Sympy? Or is it a combination of all the three? Will
SAGE move to a single backend in the future? If this bug can't be fixed,
is it suggested that I rewrite the code using the Sympy library?
P.S If anyone is running the code, then please note that it takes
Minh Nguyen wrote:
> Hi Mani,
>
> On Thu, Aug 13, 2009 at 6:08 PM, Mani chandra wrote:
>
>> Hi,
>>
>>I have a set of variables which I defined in an array and I'm trying
>> to use "solve" to solve for these variables, but I get the followi
ist]
TypeError: 'sage.symbolic.expression.Expression' object is not iterable
However the following seems to work:
solve([Eqn[1]==0], x[1])
[x1 == x0 + x2]
The reason I need solution_dict=True is that I need to put the solution
in x[1], which solve
Hi,
Attached is the code.
x = var('x')
def f(x):
if (x > 0):
return x**2
elif (x <= 0):
return -x**2
f(x).integrate(x, 0, 10)
output:
Traceback (most recent call last):
File "", line 1, in
File "/home/mc/.sage/sage_notebook/worksheets/admin/2/code/58.py", line 14,
1), (k, -20, 20) ) )
@interact
def _(a=(1.0), k_min=(-20.0), k_max=(20.0), l=(0..50) ):
show(plot(delta_l_hs(l, k, a), (k, k_min, k_max) ) )
Help appreciated.
Mani chandra
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To unsubs
, theta = var('r_, theta')
x = r_*cos(theta)
y = r_*sin(theta)
z = exp_ikz_expansion(r_, theta, 10).real()
@interact
def _(r=(10.0), l_max=(0..20)):
parametric_plot3d( [x, y, z], (r_, 0, r), (theta, 0, 2*pi) )
Help appreciated.
Ma
Hi,
How can I get 3D plots side by side? Also when using interact for
sliders, how do I make it such that the evaluation is done after maybe I
press some button instead of it being evaluated immediately after I
change a value on the slider?
Thanks
Mani chandra
Simon King wrote:
> Dear Mani chandra,
>
> something really weird seems to be going on. This is a fresh session
> of Sage 3.3:
>
> sage: complex(0,1)*spherical_bessel_J(1,1)
> --
/coerce.so
in sage.structure.coerce.CoercionModel_cache_maps.bin_op
(sage/structure/coerce.c:5833)()
TypeError: unsupported operand parent(s) for '*': '' and
'Symbolic Ring'
Help appreciated. Thank you
Mani chandra
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