rix in the process of
find inv(A) ???).
Any guidance you people can provide in this regard would be most
appreciated. Thank you!
--
Shriramana Sharma
--
You received this message because you are subscribed to the Google Groups
"sympy" group.
To post to this group, send email to sympy@go
i and thanks for your reply. As I said, I'm trying to merge Beziers.
Perhaps it would help if I separately solved using the x and y
coefficients (since parametric Bezier curves are handled that way
anyhow).
I'll try that and get back if I have any more questions.
--
Shriramana Sharma
11]: ax**2*vy**2 - 2*ax*ay*vx*vy + ay**2*vx**2
In [12]: simplify(((ax*vy-ay*vx)**2).expand())
Out[12]: ax**2*vy**2 - 2*ax*ay*vx*vy + ay**2*vx**2
--
Shriramana Sharma
--
You received this message because you are subscribed to the Google Groups
"sympy" group.
To post to t
Thanks both for your very useful replies! :-)
--
Shriramana Sharma
--
You received this message because you are subscribed to the Google Groups
"sympy" group.
To post to this group, send email to sympy@googlegroups.com.
To unsubscribe from this group, send email to
symp
ff stuff, I still get the same error.
I would most appreciate it if anyone could advise me on what to do. Thanks!
--
Shriramana Sharma
--
You received this message because you are subscribed to the Google Groups
"sympy" group.
To post to this group, send email to sympy@g
On Sun, Nov 18, 2012 at 1:29 PM, Chris Smith wrote:
>
>>>> def f(l, i):
> ... return lamb * ( 1 + (-mu)**(l+i) ) * binomial(l+i,i)
> ...
This is what I ended up figuring out myself! Anyhow, thanks for the
detailed explanation. I'll be back with more queries later.
On Sun, Nov 18, 2012 at 3:03 PM, Shriramana Sharma wrote:
> I'll be back with more queries later. :-)
OK so here's my next query on the same thread:
In [1]: from sympy import *
...: i,j=symbols('i j',integer=True)
...: lamb=list(symbols('lamb:4'))
...:
On Sun, Nov 18, 2012 at 8:16 PM, Shriramana Sharma wrote:
>
>...: summation(lamb[i]*(-1)**(n-j)*binomial(i,n-j),(i,n-j,n))
One logical error I found in the above line is that j doesn't have a
definite (integer) value, so how can summation run i from n-j to n,
but even when I a
y coming to think that
successful use of SymPy involves use of both Python and SymPy
semantics, right? If I do the summation manually i.e. using Py
semantics, it's quite straightforward, but my query is how to do it
using SymPy's summation semantics.
Thanks ever more for your kind help! :-)
[4]: lamb0=4
In [5]: lamb
Out[5]: [lamb0, lamb1, lamb2, lamb3]
In [6]: lamb[0]
Out[6]: lamb0
In [7]: type(lamb[0])
Out[7]: sympy.core.symbol.Symbol
In [8]: type(lamb0)
Out[8]: builtins.int
I don't get it -- there are *two* objects with name lamb0 in the
current namespace? How can that be?
2*Ra(4)*Ra(6) + Ra(5)**2
11 2*Ra(5)*Ra(6)
12 Ra(6)**2
Thanks!
--
Shriramana Sharma
--
You received this message because you are subscribed to the Google Groups
"sympy" group.
To post to this group, send email to sympy@googlegroups.com.
To unsubscribe from this group
On Thu, Nov 29, 2012 at 8:22 AM, Aaron Meurer wrote:
> In that case, just use expr.coeff(t, n).
Aaron and Chris, thank you both for your reply. I was looking under
Poly but apparently this is a generic method for Expr.
--
Shriramana Sharma
--
You received this message because you
hould define Python functions using
def Pplus(i,t) and def P(t) or I should define symbolic functions
using lambdify and implemented_function. Sorry if I sound lost,
because I *am* lost -- I am not yet able to figure out the SymPy way
of doing things.
--
Shriramana Sharma
--
You received this me
t does not resolve it until an operable (i.e.
numeric) value is specified, just like the binomial function's
behavious below:
In [10]: var('n,i',integer=True)
Out[11]: (n, i)
binomial(n,i)
Out[12]: binomial(n, i)
binomial(5,2)
Out[13]: 10
Thanks, and sorry again for the extreme noob
mation(t**i*Ra(i),(i,0,5)))
Thanks!
--
Shriramana Sharma
--
You received this message because you are subscribed to the Google Groups
"sympy" group.
To post to this group, send email to sympy@googlegroups.com.
To unsubscribe from this group, send email to
sympy+unsubscr...@googlegroups.com
Dec 1, 2012 at 8:30 AM, Shriramana Sharma wrote:
> print(summation(t**i*Ra(i),(i,0,5)))
Curiously replacing 5 by n, i.e. as
print(summation(t**i*Ra(i),(i,0,n))) gives the output:
Sum(t**i*Sum((-1)**(i + j)*ival(j)*binomial(i, j)*binomial(n, i), (j,
0, i)), (i, 0, n))
so only when the actual finite ev
On Sat, Dec 1, 2012 at 9:13 AM, Shriramana Sharma wrote:
>> easy way to fix it is to use summation(t**i*Ra(i),(i,0,5)).doit().
>
> Wow nice, that works!
... but the problem is that it expands the binomial function too and
the output is not so readable as a result:
t**5*(-n*(n - 4
of the bug I can report it.
--
Shriramana Sharma
--
You received this message because you are subscribed to the Google Groups
"sympy" group.
To post to this group, send email to sympy@googlegroups.com.
To unsubscribe from this group, send email to
sympy+unsubscr...@googlegroups.com.
On Sat, Dec 1, 2012 at 10:15 AM, Aaron Meurer wrote:
> The bug here is that the binomial(n, 5) is automatically evaluating
> itself. It should remain unevaluated, except when expand(func=True)
> is called on it.
Reported http://code.google.com/p/sympy/issues/detail?id=3544
--
S
Py way to
use subscripted variables? That is, I want x0 x1 etc and need to be
able to specify them by x and 0,1 etc. Of course, symbols('x'+str(i))
would work but it is a hack, and it wouldn't make it convenient to
construct expressions using such subscripted variables...
Thanks
;s not clear why it is happening or how to fix it without seeing your
> definition if QPointF.
http://riverbankcomputing.com/static/Docs/PyQt4/html/qpointf.html -- I
suppose that definition isn't SymPy-compatible?
--
Shriramana Sharma
--
You received this message because you are subscr
symbolic variables in SymPy?
--
Shriramana Sharma
--
You received this message because you are subscribed to the Google Groups
"sympy" group.
To post to this group, send email to sympy@googlegroups.com.
To unsubscribe from this group, send email to
sympy+unsubscr...@googlegroups.com.
expert programmer, but I hope you get what
kind of functionality I am expecting...
--
Shriramana Sharma
--
You received this message because you are subscribed to the Google Groups
"sympy" group.
To post to this group, send email to sympy@googlegroups.com.
To unsubscribe from this gro
tributeError: 'int' object has no attribute 'free_symbols'
The subscriptable symbol which I expect should be able to handle the
above solve command. Or if I have to alter my usage slightly (i.e.
without using all that atoms etc) for IndexedBase itself (or some
existing subclass the
c indices.
Try:
avals=list(symbols('a:10'))
i=symbols('i',integer=True)
print(summation(avals[i],(i,0,9)))
and you will see what I am talking about.
--
Shriramana Sharma
--
You received this message because you are subscribed to the Google Groups
"sympy" group.
To p
used with solve(), right? So this doesn't really seem
to be a solution...
--
Shriramana Sharma
--
You received this message because you are subscribed to the Google Groups
"sympy" group.
To post to this group, send email to sympy@googlegroups.com.
To unsubscribe from this group, send ema
and 2. Alas, all it knows is the combined
> string "X_12".
Wouldn't it be advisable to separate the row and col indices in the
subscript: X₁,₂ ? Otherwise how to go beyond 9?
--
Shriramana Sharma
--
You received this message because you are subscribed to the Google Groups
"
ymPy. Since subscripted (i.e. indexed)
variables (and in some case even super+sub-scripted or i.o.w.
multi-index variables) are widely used in mathematics I hope I would
not be the only person to be benefited.
--
Shriramana Sharma
--
You received this message because you are subscribed to the Goo
2, -3*A[0]+ 6*A[1] - 15]))
Hi can you clarify why you have used a * inside the Tuple constructor
in both the above cases and why the additional () around the []
containing the list in the second case? The Tuple documentation
doesn't seem to speak about either of these two. Thanks!
--
Shri
Sorry for the extra mail!
On Sun, Dec 2, 2012 at 10:04 PM, Shriramana Sharma wrote:
> Hi can you clarify why you have used a * inside the Tuple constructor
> in both the above cases and why the additional () around the []
> containing the list in the second case? The Tuple docu
ients and not variables...
Thanks!
--
Shriramana Sharma
--
You received this message because you are subscribed to the Google Groups
"sympy" group.
To post to this group, send email to sympy@googlegroups.com.
To unsubscribe from this group, send email to
sympy+unsubscr...@googlegroup
endent(*X) etc :-)
--
Shriramana Sharma
--
You received this message because you are subscribed to the Google Groups
"sympy" group.
To post to this group, send email to sympy@googlegroups.com.
To unsubscribe from this group, send email to
sympy+unsubscr...@googlegroups.com.
For
On Mon, Dec 3, 2012 at 4:25 PM, Shriramana Sharma wrote:
> Hey nice! Do I understand correctly this mean that pulling the latest
> Git (yes I've become a cloner) will allow me to use IndexedBase
> objects like this?
OK now pulled latest git but I understand this is not into trunk
bove, however, looks a little more text-bookish
> and easier on the fingers.
Definitely! First I was scared off by that as_independent(*X) etc
which you had previously suggested, but this is very neat and
understandable.
--
Shriramana Sharma
--
You received this message because
rmatted -- just thought
I'd mention.)
Thank you!
--
Shriramana Sharma
--
You received this message because you are subscribed to the Google Groups
"sympy" group.
To post to this group, send email to sympy@googlegroups.com.
To unsubscribe from this group, send email to
sympy+unsub
superficial but I'll be back if I have any
further problems later. The following error message which I got was
very useful to know as well:
>>> e=x**2
>>> e.replace(2,3)
TypeError: first argument to replace() must be a type, an expression
or a callable
--
Shriramana Sharma
MathJax-style output. Instructions would
be *most* appreciated. (I have libjs-mathjax installed as a dependency
of ipython3-notebook. Running Kubuntu Precise with latest updates.)
Thank you!
--
Shriramana Sharma
--
You received this message because you are subscribed to the Google Groups
"
y much! I have backported the latest IPython (0.13.1) to
Precise so I used the latter.
--
Shriramana Sharma
--
You received this message because you are subscribed to the Google Groups
"sympy" group.
To post to this group, send email to sympy@googlegroups.com.
To unsubscribe from th
provide? (This might
even be considered a bug.)
Thanks.
--
Shriramana Sharma
--
You received this message because you are subscribed to the Google Groups
"sympy" group.
To post to this group, send email to sympy@googlegroups.com.
To unsubscribe from this group, send email to
sympy+uns
rator[] but at the
same time provide consistent output from operator() of type Matrix
only.
BTW I hope that the output of such an operator() can be used as both
lvalue and rvalue (else it wouldn't be useful)...
--
Shriramana Sharma
--
You received this message because you are subscribed t
unnecessary IMHO. Is there a reason why
Matrix cannot directly support replace when it can support subs (as
seen in even the tutorial)?
--
Shriramana Sharma
--
You received this message because you are subscribed to the Google Groups
"sympy" group.
To post to this group, send email
can be provided out of the box IMO -- just like is available with
simplify().
--
Shriramana Sharma
--
You received this message because you are subscribed to the Google Groups
"sympy" group.
To post to this group, send email to sympy@googlegroups.com.
To unsubscribe from this group,
) )
c = a * b
print ( a, "*", b, "=", c )
x, y = symbols ( 'x, y' )
d = Matrix ( 1, 2, ( x ** 3, y ** 3 ) )
e = Matrix ( 2, 2, ( x ** 2, 2 * x * y, 2 * x * y, y ** 2 ) )
f = d * e
print ( d, "*", e, "=", f )
tex . xdvi ()
--
Shriramana Sha
nce
for the matrix to easily read the equations I'm handling. I don't need
to include anything into a TeX document (for now).
@Alan: Thanks for the package. I'll get around to testing it later.
(Currently working on some other parts of my project.)
--
Shriramana Sharma
--
You receive
**2 etc. However it
doesn't seem as if isympy supports the ipython Qt console (please tell
me if I am mistaken). So I'd like to how to manually set the printing
order?
Thanks.
--
Shriramana Sharma
--
You received this message because you are subscribed to the Google Groups
"sympy&
in the same help, under order, there is no entry for rev-lex. It
is not also clear that revlex, rev-lex both are accepted. Can you
please update the docstring? Thanks.
--
Shriramana Sharma
--
You received this message because you are subscribed to the Google Groups
"sympy" group.
To po
Console session, and do
the following:
from sympy import *
init_session(order='rev-lex',use_latex=True)
var('t')
t+t**2+1
I only get the regular pretty printing. I have TeXLive 2012 installed
on my system from PPA. Using SymPy 0.7.2 on Py 3.2.3.
--
Shriramana Sharma
--
On Fri, Dec 28, 2012 at 6:48 PM, Shriramana Sharma wrote:
> Uh oh, looks like I spake too soon. Durand-Kerner stumbles over itself
> in cases of multiple roots being identical.
There is already this bug upstream:
http://code.google.com/p/mpmath/issues/detail?id=217
--
Shriramana
hat else I have to do, thanks!
--
Shriramana Sharma
--
You received this message because you are subscribed to the Google Groups
"sympy" group.
To post to this group, send email to sympy@googlegroups.com.
To unsubscribe from this group, send email to
sympy+unsubscr...@googlegroups.com
#x27;grevlex'? i.e. what is this "graded reverse
lexicographic" ordering?
Thanks.
--
Shriramana Sharma
--
You received this message because you are subscribed to the Google Groups
"sympy" group.
To post to this group, send email to sympy@googlegroups.com.
To unsubscribe from
separately: v0.17.2) and my
durandkerner implementation are able to do it. Should I report this as
as bug?
--
Shriramana Sharma
--
You received this message because you are subscribed to the Google Groups
"sympy" group.
To post to this group, send email to sympy@googlegroups.com.
To u
t *
In [2]: var('x y')
Out[2]: (x, y)
In [3]: latex(x+I*y)
Out[3]: 'x + \\mathbf{\\imath} y'
In [4]: latex(2+I*3)
Out[4]: '2 + 3 \\mathbf{\\imath}'
... that mathbf does not have all symbols so it should not be used for
this purpose. Anyone to confirm/deny?
--
e seems to fail. What is
the method by which SymPy arrives at this result?
Thank you!
--
Shriramana Sharma ஶ்ரீரமணஶர்மா श्रीरमणशर्मा
--
You received this message because you are subscribed to the Google Groups
"sympy" group.
To unsubscribe from this group and stop receiving emails f
ively
differentiated numerators and denominators (as per L'Hopital) I ran up
against the same problem as before, i.e. when the numerator becomes
non-zero, the denominator becomes a NaN. Perhaps I should sub-apply
L'Hopital to the denominator to resolve the NaN status.
Thanks anyhow...
--
ames&suite=all§ion=all
except for a new build. The changelog says it's for some kpathsea
transition but I'm not sure whether that would be the cause of the
problem.
Should I ask about this on some other list perhaps?
--
Shriramana Sharma ஶ்ரீரமணஶர்மா श्रीरमणशर्मा
--
You received
So I also tried this in IPython3 Notebook, but again some problem:
In [1]:
%load_ext sympy.interactive.ipythonprinting
from sympy import *
var('x')
Out[1]:
[Math Processing Error]
Using Firefox 21.
--
Shriramana Sharma ஶ்ரீரமணஶர்மா श्रीरमणशर्मा
--
You received this message b
On Mon, Jun 17, 2013 at 12:28 AM, Aaron Meurer wrote:
> What versions of SymPy and IPython are you using?
Sorry about that -- python3-sympy 0.7.2-1raring1 and ipython3 0.13.2-1.
--
Shriramana Sharma ஶ்ரீரமணஶர்மா श्रीरमणशर्मा
--
You received this message because you are subscribed to
*", did "%load_ext sympyprt" or "%load_ext
sympyprt3" and so far no problems, but as usual when I do var('x'), I
should get the beautified x output but I get a segfault notification
on the terminal and the same dvipng error notification within IPy.
--
Shriramana Sh
pt]{article}
\usepackage{amsmath,amssymb}
\pagestyle{empty}
\begin{document}
$ \infty $
\end{document}
produces a segfault. I have asked about this over at
http://lists.nongnu.org/archive/html/dvipng/ (but the archives
apparently need some time to be updated.)
--
Shriramana Sharma ஶ்ரீரமணஶர்மா श्रीरमणशर्
On Mon, Jun 17, 2013 at 10:43 AM, Shriramana Sharma wrote:
> produces a segfault. I have asked about this over at
> http://lists.nongnu.org/archive/html/dvipng/ (but the archives
> apparently need some time to be updated.)
Hm -- I finally traced this segfault back to dvipng's sou
60 matches
Mail list logo
