Symbol/symbol was a typo - I didn't copy and paste from my python editor.
I tried x**2 and I still received the same error.
I've updated to SymPy 0.7.3 and I still get the error.
If I try to use SymPy 0.7.4, 0.7.4.1, 0.7.5 or the git master then I get
the following:
>>>import sympy
unicode_escape_decode() takes no arguments
Thanks, Andy
On Saturday, April 5, 2014 4:41:20 PM UTC+1, Matthew wrote:
>
> Also, any feedback from using SymPy with IronPython? We don't get a lot
> of feedback from that community, your thoughts/concerns here would be
> appreciated.
>
>
> On Sat, Apr 5, 2014 at 8:40 AM, Matthew Rocklin
> <mroc...@gmail.com<javascript:>
> > wrote:
>
>> Also, feel free to use x**2 rather than pow(x, 2) . Your integrand here
>> is not the same as what you put in to the integral calculator.
>>
>>
>> On Sat, Apr 5, 2014 at 8:38 AM, Matthew Rocklin
>> <mroc...@gmail.com<javascript:>
>> > wrote:
>>
>>> Symbol should be upper case. Other than that everything is fine. You
>>> also might want to update your sympy version at some point
>>>
>>> In [1]: from sympy import *
>>> In [2]: x = Symbol('x')
>>>
>>> In [3]: d = diff(2 * pow(x, 2), x)
>>> In [4]: d
>>> Out[4]: 4*x
>>>
>>> In [5]: length = integrate(sqrt(1 + pow(d, 2)), (x, 5, 10))
>>> In [6]: length
>>> Out[6]: -5*sqrt(401)/2 - asinh(20)/8 + asinh(40)/8 + 5*sqrt(1601)
>>>
>>>
>>>
>>> On Sat, Apr 5, 2014 at 4:00 AM, Groover <aja...@gmail.com
>>> <javascript:>>wrote:
>>>
>>>> Hello,
>>>>
>>>> It's been 20 years since I did any calculus, so please be gentle. :)
>>>>
>>>> Using SymPy 0.7.2 and IronPython 2.7.4.
>>>>
>>>> import sympy
>>>> from sympy import *
>>>>
>>>> # calculate arc length
>>>> x = symbol('x')
>>>> d = diff(2 * pow(x, 2), x)
>>>> print d
>>>> length = integrate(sqrt(1 + pow(d, 2)), (x, 5, 10))
>>>> print length
>>>>
>>>> This outputs '4*x' as expected then 'zip() argument after * must be a
>>>> sequence, not dictionary-itemiterator'.
>>>>
>>>> I believe the integration is solvable to 75.173 [1], so I assume I have
>>>> an error in my Python and/or SymPy syntax. Can anyone please give me some
>>>> pointers? Thanks!
>>>>
>>>> [1]
>>>> http://www.integral-calculator.com/#expr=sqrt%281%2B%284x%5E2%29%29&ubound=10&lbound=5
>>>>
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>>>
>>
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