On Dec 11, 2007 7:25 PM, Suresh Jeevanandam <[EMAIL PROTECTED]> wrote:
>
> Dear all,
> I want to propose these features.
>
> The symbols must include these informations as well, these would be
> optional while symbol creation.
> 1) typical range
> 2) typical value ( the symbol would take a value around this value.)
>
> The Expression class must have functions which can calculate the
> typical range, value the expression can take.
>
> I think atleast the basic functionality should be easily
> implementable, IMHO this would be very useful for a practical user.
>
> Eg.
> a = Symbol('a', typical_range=(0,10))
> b = Symbol('b', typical_range=(0,5.5))
> c = a*b
> c.typical_range()
> (0,55)
>
> a.typical_value = 3.0
> b.typical_value = 2.5
> c.typical_value()
> 7.5

Thanks Suresh for proposing this. It is now an issue 489:

http://code.google.com/p/sympy/issues/detail?id=489

Ondrej

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