bad operand On fit

[whinis]

I am attempting to use SymFit to make a more user friendly model for my data and it fits however on attempt to run the model with the fit I get the following error bad operand type for unary -: 'list'

Here is my model

gibbsHelmholtModel=deltaH*(1-(T/Tm))-Cp*((Tm-T)+T*log(T/Tm))

fqcrModel = (thetaN+thetaD*exp(gibbsHelmholtModel))\
           /(1+exp(gibbsHelmholtModel))```

[tBuLi]

Hi @whinis, thanks for reporting your issue. However, it is impossible to answer this question with the information you have provided. Can you provide a minimal example so we can run the code, and include the complete traceback? Thanks!

[whinis]

I have changed how I evaluate the model by using

for param in fit.model.params:
        newModel = newModel.subs(param,fit_result.value(param))

instead of the example in order to graph it. I didn't version the code so I don't have that example anymore

[tBuLi]

You can evaluate the model as e.g.

newModel(x=xdata, **fit_results.params)

depending on what the dependent variables are, here I assume you called them x.

[whinis]

Using that is what gave me the bad operand however using subs did not

[pckroon]

Until there's a minimum working example we can use to investigate this further there is not much more we can do or say. So I'll close this issue. Feel free to reopen it or continue the conversation if you have further questions.