Do I need to reset Fsolve Parameters if I use Fsolve twice in my code ?

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farzad
farzad 2019-7-6
评论： dpb 2019-7-7
Hi All
If I have to use Fsolve twice in my code, do I need to reset any paramter ?
[x,fval,exitflag,output] = fsolve(fun,x0initial,options);
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farzad
farzad 2019-7-6
Ah sorry I didn't clarify I did not use exactly the same formulation every time That was only an example
dpb
dpb 2019-7-6
Well, again, all we see is what you post...
So, is the Q? closed? Or is there still some issue?

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Walter Roberson
Walter Roberson 2019-7-6
No. However if you do not change any of the parameters and the function does not involve random variables, then the second call would give the same result as the first call.
fsolve does not modify any of the input parameters.
I do sometimes see people using code such as
x = [0,10]
x = fzero(SomeFunction, x0, x);
and then get surprised when they try to use x as if it were still the vector instead of having been replaced with the specific solution.

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