Thanks Mike,
> You should check the version of Sage that you are using. The
> SymbolicArithmetic class shouldn't exist after Sage 4.0.
>
I test again this morning, and it's right !
Indeed I have 3 sage(s) in my ubuntu box.
The ubuntu one, an old version, the 4.1.2-a4 and my one with little
p
Hello,
On Tue, Oct 13, 2009 at 2:18 AM, Francois Maltey wrote:
> /home/fmy/.sage/temp/solen/9693/_home_fmy__sage_init_sage_0.py in ()
> > 1
> 2
> 3
> 4
> 5
> AttributeError: 'SymbolicArithmetic' object has no attribute 'collect'
>
> Is it a bug ? Where am I wrong ?
> I us
Is it possible to export the output of the jmol applet (not just a
snapshot pic) to use it offline, say in the middle of a presentation,
without having to start SAGE & FF and load the notebook?
I know you can export the javascript code from jmol, but I have no
clue how to proceed. I'm using SAGE
no error with 4.1.2.rc0
R.M.
[ma...@um-bc201 /opt/sage-4.1.2.rc0]$ ./sage
--
| Sage Version 4.1.2.rc0, Release Date: 2009-09-30 |
| Type notebook() for the GUI, and license() for information.|
--
Rolandb wrote:
> Hi, I'm interested in the motion of planets around the sun. Before I
> 'reinvent the wheel', maybe someone has made a simple model and he/she
> is willing to share it? Thanks in advance!
Hi Roland,
You asked explicitly for a simple model, so pynovas is not what you are
looking f
Hi, I'm interested in the motion of planets around the sun. Before I
'reinvent the wheel', maybe someone has made a simple model and he/she
is willing to share it? Thanks in advance!
Rolandb
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My Python script is getting very large. The html pages I am creating
are all class defs.
Can I save the defs in a text file then import them? If so where do I
put them. Isn't Sage just one large bounce of Python files?
Please, excuse my lack of Python/Sage knowledge. Six months ago I
couldn't
Hello,
About this question, I test coefficient and collect.
Is it a bug ? or is there a reason ? collect and coefficient don't have
the same react :
I take a line equation
test = cos(a)*x+sin(a)*y-h # means ... == 0
test.coefficient(cos(a)) # are right
test.coefficient(x)
test.collect(x)
t
(3*x + m*x + a*y+b*y ).collect(x).collect(y)
On 12 říj, 19:20, Chris Seberino wrote:
> How group terms in an expression?
>
> e.g. How group terms with x and y in:
>
> 3*x + m*x + a*y+b*y
>
> to get:
>
> (3 + m)*x + (a + b)*y ??
>
> cs
--~--~-~--~~-
How group terms in an expression?
e.g. How group terms with x and y in:
3*x + m*x + a*y+b*y
to get:
(3 + m)*x + (a + b)*y ??
cs
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To unsubscribe f
The thing is, I'm not interested in 55x55 matrices per se - my matrix
dimensions grow quadratically with some parameter of my system, so I'm
testing things on small sizes before embarking on real computations.
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DMonniaux wrote:
> I'm computing with sparse rational matrices of moderate size (about
> 55x55). Curiously, a lot of time seems to be spent in functions
> constructing matrices, for instance from list of sparse vectors.
>
> 1120.3850.0030.7720.007 constructor.py:33
> (matrix
I'm computing with sparse rational matrices of moderate size (about
55x55). Curiously, a lot of time seems to be spent in functions
constructing matrices, for instance from list of sparse vectors.
1120.3850.0030.7720.007 constructor.py:33
(matrix)
369/3210.0120.000
Daniel Farrell wrote:
> Hello,
>
> Is there a quadrature equivalent to integrate(f,a,b)? I have an
> equation with no analytical integral so quadrature is the only
> alternative, for example by, simps or trapz.
>
You can use numerical_integral or the scipy quad function:
http://docs.scipy.org
Hi all!
I am trying to do simple convolution:
x = PolynomialRing(QQ,'x').gen()
f=piecewise([((-1,3),1*x^0)])
g=piecewise([((0,5),exp(-x))])
r=g.convolution(f)
and got this error message:
RuntimeError: Symbolic Ring still using old coercion framework
What is wrong with it?
--~--~-~--~-
numerical_integral?
On 12 říj, 13:01, "ma...@mendelu.cz" wrote:
> Perhaps somebody knows how is this supported in Sage.
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sage-su
Perhaps somebody knows how is this supported in Sage.
I know only how to get the answer via maxima and
http://maxima.sourceforge.net/docs/manual/en/maxima_20.html#Item_003a-Introduction-to-QUADPACK
sage: expr=sin(x)/x
sage: ex=expr._maxima_()
sage: print ex.quad_qags(x,1,2,).sage()
sage: ex.quad_
Hello wxuyec,
> The same expression, How can I want to get
>
> the coefficient of x^4*y?
>
The coefficient of the coefficient...
try
var('a b x y')
res = expand ((a+b+x+y+1)^6)
res.coefficient (x^4)
res.coefficient (y)
res.coefficient (x^4).coefficient(y)
res.coefficient (y).coefficient(x^4)
The same expression, How can I want to get
the coefficient of x^4*y?
Thank you!
Mike Hansen 写道:
> Hello,
>
> 2009/10/12 :
>
>> Hi, I have another question.
>>
>> I have got the expression,
>>
>> a^2*x^4+b*x^4+c*x+d*y*x^4...(many items)
>>
>> I want to get the coefficient of all the x,x^2
On Mon, Oct 12, 2009 at 3:30 PM, wrote:
>
> Thank you.
>
> It confused me how can I know all about the method.
>
> Is there some efficient way to know all of them?
The easiest way is to use tab-completion. For example, if ex is your
object, type in "ex.simplify_" and then press TAB. It will s
Thank you.
It confused me how can I know all about the method.
Is there some efficient way to know all of them?
Laurent 写道:
> wxu...@sohu.com ha scripte:
>
>> Hi, everyone, I got the expression,
>>
>> sin(t)^8 + 4*sin(t)^6*cos(t)^2 + 6*sin(t)^4*cos(t)^4 +
>> 4*sin(t)^2*cos(t)^6 + cos(t)^8
On Oct 12, 1:11 am, wxu...@sohu.com wrote:
> Hi, everyone, I got the expression,
>
> sin(t)^8 + 4*sin(t)^6*cos(t)^2 + 6*sin(t)^4*cos(t)^4 +
> 4*sin(t)^2*cos(t)^6 + cos(t)^8
> actually it is 1. how can I get it?
sage: (sin(t)^8 + 4*sin(t)^6*cos(t)^2 + 6*sin(t)^4*cos(t)^4 + 4*sin(t)
^2*cos(t)^6 +
Thank you very much.
Mike Hansen 写道:
> Hello,
>
> 2009/10/12 :
>
>> Hi, everyone, I got the expression,
>>
>> sin(t)^8 + 4*sin(t)^6*cos(t)^2 + 6*sin(t)^4*cos(t)^4 +
>> 4*sin(t)^2*cos(t)^6 + cos(t)^8
>> actually it is 1. how can I get it?
>>
>
> Here you go:
>
> sage: t = var('t')
> sa
Hello,
2009/10/12 :
>
> Hi, I have another question.
>
> I have got the expression,
>
> a^2*x^4+b*x^4+c*x+d*y*x^4...(many items)
>
> I want to get the coefficient of all the x,x^2,x^3,x^4
>
> here for x^4 is (a^2+b+d*y...)
>
> how can I get it?
Something like this:
sage: var('a,b,c,d,x,y')
wxu...@sohu.com ha scripte:
> Hi, everyone, I got the expression,
>
> sin(t)^8 + 4*sin(t)^6*cos(t)^2 + 6*sin(t)^4*cos(t)^4 +
> 4*sin(t)^2*cos(t)^6 + cos(t)^8
> actually it is 1. how can I get it?
>
> Thanks in advance!
>
>
The secret is the method fullsimplify
var('t')
A = sin(t)**8 + 4*sin(t
Hi, I have another question.
I have got the expression,
a^2*x^4+b*x^4+c*x+d*y*x^4...(many items)
I want to get the coefficient of all the x,x^2,x^3,x^4
here for x^4 is (a^2+b+d*y...)
how can I get it?
Thanks in advance!
YC Xu
--~--~-~--~~~---~--~~
To p
Hello,
2009/10/12 :
>
> Hi, everyone, I got the expression,
>
> sin(t)^8 + 4*sin(t)^6*cos(t)^2 + 6*sin(t)^4*cos(t)^4 +
> 4*sin(t)^2*cos(t)^6 + cos(t)^8
> actually it is 1. how can I get it?
Here you go:
sage: t = var('t')
sage: a = sin(t)^8 + 4*sin(t)^6*cos(t)^2 + 6*sin(t)^4*cos(t)^4 +
4*sin(t
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