any IDE have intelligence sense for sympy
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ring r = 0,(x,y,z),dp
module MD =
[1,x2+y,x*y-y*z,0,0],[0,x*z-y,z-x,0,0],[0,0,0,x2+y,x*y-y*z],[1,0,0,x*z-y,z-x];
module MK = syz(MD);
matrix MM = MK;
print(MM);
module N =[x2+y,x*z-y],[x*y-y*z,z-x];
quotient(N,freemodule(nrows(MK)));
from sympy import QQ
from sympy.abc import x
QQ.old_poly
Hi everyone,
I was using SymPy to derive an analytic expression for a Jacobian matrix in
a least squares system. It worked very well, and I simplified the system
down to an equation which is very easy to evaluate, which however involves
a vector of residuals:
The final SymPy expression is thi
ring r = 0,(x,y,z),dp
module MD =
[1,x2+y,x*y-y*z,0,0],[0,x*z-y,z-x,0,0],[0,0,0,x2+y,x*y-y*z],[1,0,0,x*z-y,z-x];
module MK = syz(MD);
matrix MM = MK;
print(MM);
module N =[x2+y,x*z-y],[x*y-y*z,z-x];
quotient(N,freemodule(nrows(MK)));
from sympy import QQ
from sympy.abc import x
QQ.old_poly
Ideally, a code printer that printed a python function for this expression
would automatically create the numpy code you show from the expression.
But, I'm not sure any of the current printing facilities in sympy can do
that. I tried lamdify, ccode, and codegen with no luck.
Jason
moorepants.info
Any IDE that can use the IPython QT or Notebook, will give nice renderings
for sympy.
Jason
moorepants.info
+01 530-601-9791
On Fri, Jan 31, 2014 at 3:00 AM, Gerhard Martin wrote:
> any IDE have intelligence sense for sympy
>
> --
> You received this message because you are subscribed to the
Yeah - the problem seems to be that SymPy doesn't know how to convert Sum
into a Python function - or at least complains about it.
On Friday, 31 January 2014 15:54:32 UTC+1, Jason Moore wrote:
>
> Ideally, a code printer that printed a python function for this expression
> would automatically cr
Agree with Christian. However, we would need a very good heuristic to
calculate how 'far' a formula is from CNF or DNF. Frankly, if the number of
variables is small, I don't think any method would be that bad - like for
even 6-7 variables, the number of models would be at max 64-128 - a decent
For tab completion, you can try Jedi (there are plugins for popular
editors). It's tough, though, because SymPy makes use of the dynamic
features of Python more than most things, so the completion
capabilities of Jedi (which is otherwise awesome) are quite limited. I
think to get something that wor
I disagree about the symmetry. Consider the case if you have Or(big
expression 1, big expression 2). Instead of trying to convert the
whole thing into CNF or DNF, you can recursively apply the algorithm.
First just try satisfiable(big expression 1). If it's satisfiable,
that's your model. If not, t
I'm CCing Tom Bachmann, as he's the one who wrote this code, and is
probably the only one who can answer here.
Aaron Meurer
2014-01-31 Gerhard Martin :
> ring r = 0,(x,y,z),dp
>
> module MD =
> [1,x2+y,x*y-y*z,0,0],[0,x*z-y,z-x,0,0],[0,0,0,x2+y,x*y-y*z],[1,0,0,x*z-y,z-x];
>
> module MK = syz(MD);
It fails like that in master. AttributeError is pretty much always a
bug (unless you yourself accessed an attribute that is not there, or
passed in the wrong type to something).
Aaron Meurer
On Wed, Jan 29, 2014 at 12:56 PM, Matthew Rocklin wrote:
> This doesn't fail in 0.7.3 (Access to master i
from sympy import QQ, S
from sympy.polys.agca.modules import FreeModule, ModuleOrder,
FreeModulePolyRing
from sympy.polys import CoercionFailed, QQ, lex, grlex, ilex, ZZ
from sympy.abc import x, y, z
from sympy.utilities.pytest import raises
x = Symbol('x')
y = Symbol('y')
z = Symbol('z')
R = QQ.o
For the solvers idea, I direct you to the other thread on this list
that has much more discussion about it. For the step-by-step idea, I
direct you do the thread started by Matthew Rocklin. Also, you should
be aware that the by-parts algorithm is already implemented (see
manualintegrate.py). You ca
Great. Those should be useful for getting solve to return *all*
solutions in those cases, even if just in a symbolic form. Do the
algorithms work at all if there are symbolic coefficients?
Aaron Meurer
On Wed, Jan 29, 2014 at 2:23 PM, someone wrote:
> Hi,
>
>> @Harsh, could you brief your work i
The paper's behind a paywall, so I can't view it. Someone else with
access will have to see if it is worth anything. I'm questioning it
already though because it's from 1975, when the very concept of
"computer algebraic manipulation" was still very new. But that isn't
to say that there aren't some
For the UI side, the best thing right now is the integral and
differentiation steps on SymPy Gamma. It would be better to spend time
making that better than to write some curses interface (I write this
as someone who spends probably 70% of his time in front of a text
terminal, so don't think that I
solve assumes that expressions are equal to zero. So instead of
solve(Eq(a, b)) it is usually easier to just type solve(a - b).
Aaron Meurer
On Thu, Jan 30, 2014 at 11:54 PM, Sachin p wrote:
> Why did you subtracted ?
>
> On Tuesday, January 28, 2014 12:31:52 PM UTC+5:30, Sachin p wrote:
>>
>>
>
It shouldn't be too hard to implement, though, I would imagine. One
just needs to implement _print_Sum on the various code printers.
lambdify() might be trickier because the code has to fit in a lambda
expression. I'm not really sure what the best way to make it work
there would be.
Aaron Meurer
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