Hi,
Thanks for the workaround, but
subs doesn't work here:
>>> sin(exp(a*x)).subs({exp(x): x})
>>> sin(exp(a*x))
Best,
Adrian
On Saturday, August 15, 2015 at 12:11:31 AM UTC+5:30, Aaron Meurer wrote:
>
> xreplace only does exact structural replacement (the "x" stands for
> "exact"). To get mathematical replacement, use subs:
>
> >>> print(exp(5*x).subs(exp(x), sin(x)))
> sin(x)**5
>
> Aaron Meurer
>
> On Fri, Aug 14, 2015 at 5:17 AM, AMiT Kumar <[email protected]
> <javascript:>> wrote:
>
>> I am also Interested in getting the solution for this.
>>
>> *AMiT Kumar*
>>
>>
>> On Friday, August 14, 2015 at 12:08:25 PM UTC+5:30, Gaurav Dhingra wrote:
>>>
>>> Do you want something like replacing some function f1 (say `exponential
>>> function` you mentioned `{exp(x): x}` ) with some other f2 (say linear
>>> function, you mentioned `{exp(x): x}` ) in your expression ?
>>>
>>> On Friday, August 14, 2015 at 12:03:08 PM UTC+5:30, Adrián Ashley wrote:
>>>>
>>>> Correction previous example:
>>>>
>>>> In [9]: sin(exp(a*x)).some_replace_func({exp(x): x})
>>>> Out[9]: sin(x**a)
>>>>
>>>>
>>>>
>>>>
>>>> On Friday, August 14, 2015 at 11:55:55 AM UTC+5:30, Adrián Ashley wrote:
>>>>>
>>>>> Hi Sartaj,
>>>>>
>>>>> I think you didn't understood my point. I am looking for mathematical
>>>>> substitution, not exact
>>>>> substitution.
>>>>>
>>>>> exp(5*x).xreplace({exp(5*x): sin(5*x)}) is just a mere example of
>>>>> usage of xreplace. I am not
>>>>> looking for exact replacement. the exponent can be anything
>>>>>
>>>>> For example:
>>>>>
>>>>> >>> sin(exp(x)).some_replace_func({exp: x})
>>>>>
>>>>> >>> sin(x)
>>>>>
>>>>> >>> exp(5*x).some_replace_func({exp(x): sin(x)})
>>>>> >>> exp(5*x)
>>>>>
>>>>>
>>>>> Thanks,
>>>>> Best,
>>>>>
>>>>> Adrian
>>>>>
>>>>> On Friday, August 14, 2015 at 1:48:44 AM UTC+5:30, Sartaj Singh wrote:
>>>>>>
>>>>>> Try this,
>>>>>>
>>>>>> >>> exp(5*x).xreplace({exp(5*x): sin(5*x)})
>>>>>> sin(5*x)
>>>>>>
>>>>>> On 14 August 2015 at 00:24, Adrián Ashley <[email protected]> wrote:
>>>>>>
>>>>>>> Hello,
>>>>>>>
>>>>>>> How can I substitute/replace something mathematically from an
>>>>>>> expression:
>>>>>>>
>>>>>>> For example:
>>>>>>>
>>>>>>> >>> exp(5*x).xreplace({exp(x): sin(x)})
>>>>>>> >>> exp(5*x) # I would expect sin(x)**5 here
>>>>>>>
>>>>>>>
>>>>>>> In better way to do the above thing?
>>>>>>>
>>>>>>> Thanks,
>>>>>>> Best,
>>>>>>>
>>>>>>> --
>>>>>>> Adrian
>>>>>>>
>>>>>>> --
>>>>>>> You received this message because you are subscribed to the Google
>>>>>>> Groups "sympy" group.
>>>>>>> To unsubscribe from this group and stop receiving emails from it,
>>>>>>> send an email to [email protected].
>>>>>>> To post to this group, send email to [email protected].
>>>>>>> Visit this group at http://groups.google.com/group/sympy.
>>>>>>> To view this discussion on the web visit
>>>>>>> https://groups.google.com/d/msgid/sympy/4be0109e-a665-4c89-8774-0300163250f0%40googlegroups.com
>>>>>>>
>>>>>>> <https://groups.google.com/d/msgid/sympy/4be0109e-a665-4c89-8774-0300163250f0%40googlegroups.com?utm_medium=email&utm_source=footer>
>>>>>>> .
>>>>>>> For more options, visit https://groups.google.com/d/optout.
>>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Regards
>>>>>> *Sartaj Singh*
>>>>>>
>>>>>> *Mathematics and Computing*,
>>>>>> Indian Institute of Technology,
>>>>>> Varanasi - 221 005 INDIA
>>>>>>
>>>>>> E-mail: [email protected], *[email protected]*
>>>>>>
>>>>> --
>> You received this message because you are subscribed to the Google Groups
>> "sympy" group.
>> To unsubscribe from this group and stop receiving emails from it, send an
>> email to [email protected] <javascript:>.
>> To post to this group, send email to [email protected] <javascript:>
>> .
>> Visit this group at http://groups.google.com/group/sympy.
>> To view this discussion on the web visit
>> https://groups.google.com/d/msgid/sympy/f4f3b7a4-00ec-4d0c-85bd-86e6b4731c64%40googlegroups.com
>>
>> <https://groups.google.com/d/msgid/sympy/f4f3b7a4-00ec-4d0c-85bd-86e6b4731c64%40googlegroups.com?utm_medium=email&utm_source=footer>
>> .
>>
>> For more options, visit https://groups.google.com/d/optout.
>>
>
>
--
You received this message because you are subscribed to the Google Groups
"sympy" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at http://groups.google.com/group/sympy.
To view this discussion on the web visit
https://groups.google.com/d/msgid/sympy/1a705f97-779d-4b7b-b5e2-ea14ee4ca967%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
