As can be seen in the former script, parameter names should be made in a
dynamic way.
I am wondering how using for loop in string can be simultaneously
handled.
Regards,
Zohreh Karimzadeh
*https://www.researchgate.net/profile/Zohreh-Karimzadeh*
<https://www.researchgate.net/profile/Zohreh-Karimzadeh>
Skype Name 49a52224a8b6b38b
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((((((((((((((((Value Water)))))))))))))))
On Wed, Aug 24, 2022 at 9:32 PM gu...@uwosh.edu <gu...@uwosh.edu> wrote:
> Zohreh,
>
> The code snippets you have provided do not suggest you are doing anything
> that requires sympy. So, I am confused. It looks like you need a function
> that generates a string of the summations in your expression, when passed
> species. I think there is a fixed number of parameters for each species.
> You are probably better off building the string for your expressions
> without involving sympy. I am thinking something like this to define part
> of your fit function:
>
>
> def term(species_name):
>
> return(species_name+'_param1*conc_'+species_name+'+'+species_name+'_param2*np.sqrt(conc_'+species_name+')')
> Then
> term('Cl')
> returns
> 'Cl_param1*conc_Cl+Cl_param2*np.sqrt(conc_Cl)'
>
> Then build your overall expression from these pieces. Then do a fit with
> initial guesses for all the parameters.
>
> That's how I would do it unless I am manipulating the expressions using
> sympy first.
>
> Jonathan
> On Wednesday, August 24, 2022 at 11:11:58 AM UTC-5 z.kari...@gmail.com
> wrote:
>
>> I should extract the required model for each system of chemicals and do a
>> least squre for derived model and parameters to find the parameters for
>> each chemical systems.
>>
>>
>> Zohreh Karimzadeh
>>
>> Contact me on
>> +989102116325 <+98%20910%20211%206325>
>> and at
>> z.kari...@gmail.com
>> 🌧️🌍🌱
>>
>> On Wed, 24 Aug 2022, 19:33 gu...@uwosh.edu, <gu...@uwosh.edu> wrote:
>>
>>> Zohreh,
>>>
>>> I pulled the paper. I see no reason you need to use SymPy to do the
>>> numerical fitting. I would approach this by inputting the species in a
>>> dictionary or list and then use that to call functions that generate the
>>> computed value for each term/sum. Are you trying to keep track of the
>>> complete symbolic expression or do a numerical calculation?
>>>
>>> If you are using chemical symbols or reactions, are you taking
>>> advantage of ChemPy?
>>>
>>> Jonathan
>>> On Tuesday, August 23, 2022 at 12:01:02 AM UTC-5 z.kari...@gmail.com
>>> wrote:
>>>
>>>> As following, I should generate each parameters dynamically (for 20-30
>>>> terms):
>>>>
>>>> term_vnca = 0
>>>> for k in anion:
>>>> for j in cation:
>>>> for i in neutral:
>>>> term_vnca += term_vncX - 4 * 3 * sp.symbols(f'X{str(k)}') *
>>>> sp.symbols('X{0}'.format(str(i))) \
>>>> ** 2 * sp.symbols(f'V{str(i)}{str(j)}{str(k)}')
>>>> lnfXs = term_wnca + term_unca + term_vnca + termx_w_solvent1 +
>>>> termx_w_solvent2
>>>>
>>>> Zohreh Karimzadeh
>>>> *https://www.researchgate.net/profile/Zohreh-Karimzadeh*
>>>> <https://www.researchgate.net/profile/Zohreh-Karimzadeh>
>>>> Skype Name 49a52224a8b6b38b
>>>> Twitter Account @zohrehkarimzad1
>>>> z.kari...@gmail.com
>>>> +989102116325 <+98%20910%20211%206325>
>>>>
>>>> ((((((((((((((((Value Water)))))))))))))))
>>>>
>>>>
>>>> On Tue, Aug 23, 2022 at 9:26 AM Zohreh Karimzadeh <z.kari...@gmail.com>
>>>> wrote:
>>>>
>>>>> Not these model and parameters, My model is very complicated wit large
>>>>> number of parameters:
>>>>> [image: image.png]
>>>>> As a very simple example I raise this question.
>>>>> Zohreh Karimzadeh
>>>>>
>>>>> Contact me on
>>>>> +989102116325 <+98%20910%20211%206325>
>>>>> and at
>>>>> z.kari...@gmail.com
>>>>> 🌧️🌍🌱
>>>>>
>>>>>
>>>>> On Tue, 23 Aug 2022, 05:16 Peter Stahlecker, <peter.st...@gmail.com>
>>>>> wrote:
>>>>>
>>>>>> Dear Zohreh,
>>>>>>
>>>>>> Just for my understanding:
>>>>>> 1.
>>>>>> You params are alpha, betta ,gamma, eta (?)
>>>>>> 2.
>>>>>> What do you mean by generating them dynamically?
>>>>>>
>>>>>> Peter
>>>>>>
>>>>>> On Tue 23. Aug 2022 at 02:44 Zohreh Karimzadeh <z.kari...@gmail.com>
>>>>>> wrote:
>>>>>>
>>>>>>> Dear Oscar
>>>>>>> BIG help !
>>>>>>> Here I seriously need to use sympy to generate my params dynamically.
>>>>>>> All Bests
>>>>>>> Zohreh Karimzadeh
>>>>>>> *https://www.researchgate.net/profile/Zohreh-Karimzadeh*
>>>>>>> <https://www.researchgate.net/profile/Zohreh-Karimzadeh>
>>>>>>> Skype Name 49a52224a8b6b38b
>>>>>>> Twitter Account @zohrehkarimzad1
>>>>>>> z.kari...@gmail.com
>>>>>>> +989102116325 <+98%20910%20211%206325>
>>>>>>>
>>>>>>> ((((((((((((((((Value Water)))))))))))))))
>>>>>>>
>>>>>>>
>>>>>>> On Mon, Aug 22, 2022 at 7:42 PM Oscar Benjamin <
>>>>>>> oscar.j....@gmail.com> wrote:
>>>>>>>
>>>>>>>> On Mon, 22 Aug 2022 at 15:36, Peter Stahlecker
>>>>>>>> <peter.st...@gmail.com> wrote:
>>>>>>>> >
>>>>>>>> > Dear Oscar,
>>>>>>>> >
>>>>>>>> > Thanks for your hint about these parameters!.
>>>>>>>> > Probably dumb question of mine:
>>>>>>>> > Could one not define f_Vi_est directly as
>>>>>>>> >
>>>>>>>> > def_Vi_est(gamma, alfa, beta, eta, L, K, VA):
>>>>>>>> > Vi_est = gamma - (1 / eta)…..
>>>>>>>> > return np.sum(…..)
>>>>>>>> >
>>>>>>>> > without any ‚lambdification‘?
>>>>>>>>
>>>>>>>> Yes. In an earlier post the OP showed that they had working code
>>>>>>>> like
>>>>>>>> that but wanted to know how to do it using SymPy and lambdify. I
>>>>>>>> presume there is a reason for wanting to use SymPy there (perhaps to
>>>>>>>> accomplish something slightly different from the exact code shown).
>>>>>>>> It's also possible that there isn't any actual reason to use SymPy
>>>>>>>> for
>>>>>>>> this at all though.
>>>>>>>>
>>>>>>>> --
>>>>>>>> Oscar
>>>>>>>>
>>>>>>>> --
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>>>>>>>> To view this discussion on the web visit
>>>>>>>> https://groups.google.com/d/msgid/sympy/CAHVvXxQJUuZ4tVnECPyWE%3DLd03hhhUB5mqv1bjHcjSNf9WP22Q%40mail.gmail.com
>>>>>>>> .
>>>>>>>>
>>>>>>> --
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>>>>>>> <https://groups.google.com/d/msgid/sympy/CA%2B1XYLOMV_i3VJXwwVN7JWnuJ9Wo6ZPhULmC1SOubAfFLt-DBQ%40mail.gmail.com?utm_medium=email&utm_source=footer>
>>>>>>> .
>>>>>>>
>>>>>> --
>>>>>> Best regards,
>>>>>>
>>>>>> Peter Stahlecker
>>>>>>
>>>>>> --
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>>>>>> <https://groups.google.com/d/msgid/sympy/CABKqA0YTOzyZkjhnQmKQKQh-Mrc_H_TcmD9FrXObaTadkfLpkQ%40mail.gmail.com?utm_medium=email&utm_source=footer>
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>>>>>>
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