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 <adb...@gmail.com> 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
>>>>
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>>>
>>>
>>>
>>> --
>>> Regards
>>> *Sartaj Singh*
>>>
>>> *Mathematics and Computing*,
>>> Indian Institute of Technology,
>>> Varanasi - 221 005 INDIA
>>>
>>> E-mail: singhs...@gmail.com, *sartaj.si...@itbhu.ac.in*
>>>
>>
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