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
--
Shriramana Sharma
Le 30/11/2012 22:23, Aaron Meurer a écrit :
It's worth pointing out that Float does the same thing, if you give it a
high enough precision. Try Float(3.2, 100) for example.
To me, it should just work. Yes, we should encourage the use of strings
over float literals, but Rational(float) not workin
On Fri, Nov 30, 2012 at 9:27 PM, Shriramana Sharma wrote:
> On Sat, Dec 1, 2012 at 9:32 AM, Aaron Meurer wrote:
>> I guess it's not necessarily a good idea to auto-expand things like
>> binomial(n, 5). Go ahead and open another issue for that if you want.
>> Probably it should be changed to rema
On Sat, Dec 1, 2012 at 9:32 AM, Aaron Meurer wrote:
> I guess it's not necessarily a good idea to auto-expand things like
> binomial(n, 5). Go ahead and open another issue for that if you want.
> Probably it should be changed to remain unevaluated, and to expand
> with expand(func=True).
Hi Aaro
If you call simplify, it simplifies a little bit.
I guess it's not necessarily a good idea to auto-expand things like
binomial(n, 5). Go ahead and open another issue for that if you want.
Probably it should be changed to remain unevaluated, and to expand
with expand(func=True).
Aaron Meurer
On
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)*(n - 3)*(n - 2
Thanks for replying.
On Sat, Dec 1, 2012 at 8:49 AM, Aaron Meurer wrote:
>
> easy way to fix it is to use summation(t**i*Ra(i),(i,0,5)).doit().
Wow nice, that works!
> Care to open an issue for this in our issue tracker
> (https://code.google.com/p/sympy/issues/list)?
I reported it here with y
On Fri, Nov 30, 2012 at 8:00 PM, Shriramana Sharma wrote:
> Hello. Trying to execute the following minimal example throws SymPy
> into an infinite loop. (Obviously this is an extract from my actual
> program.) I tried debugging using eric5 but beyond that the problem
> occurs within the Ra() funct
Hello. Trying to execute the following minimal example throws SymPy
into an infinite loop. (Obviously this is an extract from my actual
program.) I tried debugging using eric5 but beyond that the problem
occurs within the Ra() function, I couldn't find out anything. Can
please anyone tell me what I
It's worth pointing out that Float does the same thing, if you give it a
high enough precision. Try Float(3.2, 100) for example.
To me, it should just work. Yes, we should encourage the use of strings
over float literals, but Rational(float) not working makes it seem as if
the conversion is not su
At http://code.google.com/p/sympy/issues/detail?can=2&q=2950 I give the
reasons why I don't think it should.
The work is at https://github.com/sympy/sympy/pull/1680 (which disallows
it).
Should we just let the user shoot themselves in the foot if they request
Rational from floats or should we
That link didn't work for me. This one did though
http://code.google.com/p/sympy/issues/detail?id=3250
No other help to offer at the moment.
On Fri, Nov 30, 2012 at 2:12 PM, smichr wrote:
> On issue 3250 I have a function that will allow precision to be preserved
> during conversion into and o
A python function will just return whatever you tell it to return. If
you give it symbolic input, it will plug that in and return it.
A subclass of Function will work like
In [20]: class MyFunc(Function):
: @classmethod
: def eval(cls, arg):
: if arg == 1:
On issue 3250 I have a function that will allow precision to be preserved
during conversion into and out of Poly but it is giving an error that I am
familiar with, but not in the current context: "foo() takes exactly 1
argument (2 given)" I can't see what I am doing wrong. I describe the
proble
Oh, for that, you want to subclass Function and define the eval
method. implemented_function might do this as well (I don't remember
the details and I'm not at my computer right now).
Aaron Meurer
On Nov 30, 2012, at 8:04 AM, Shriramana Sharma wrote:
> On Fri, Nov 30, 2012 at 10:06 AM, Aaron Me
On Fri, Nov 30, 2012 at 10:06 AM, Aaron Meurer wrote:
> lambdify and implemented_function are best if you intend to evaluate
> these numerically. Otherwise, just use a regular Python function.
Hi thanks. Please also clarify how I can make a function which accepts
a symbolic argument but does not
16 matches
Mail list logo
