Friedrich Hagedorn wrote:
> On Fri, Apr 17, 2009 at 07:32:42PM -0700, Luke wrote:
>
>> I am working with some sympy Functions that are dependent upon a sympy
>> Symbol 't'. For example:
>> t = Symbol('t')
>> q1 = Function('q1')(t)
>>
>> When q1 is printed I get:
>> q1(t)
>> Similarly, when q1.diff(t) is printed I get:
>> D(q1(t), t)
>>
>> I would instead like the following behavior:
>> In: print q1
>> Out: q1
>> In: print q1.diff(t)
>> Out: q1'
>>
>
> This it not possible with the current sympy as far as I know.
>
>
>> Basically, the Functions that I am working with are generalized
>> coordinates, and their time dependence is implied so having the (t)
>> just makes all the expressions really long and hard to look at.
>> Similarly for q1.diff(t).
>>
>
> May be you can do your calculations with two different symbols:
>
> q1, q1_dot (or Dq1)
>
> You could tell us more about your problem in hope we can find a
> practical solution.
>
> By,
>
> Friedrich
>
> >
>
>
Copy the print module in sympy and modify it to suit your needs. See
http://docs.sympy.org/modules/printing.html
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