Using fsolve in another fsolve mfile

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Minhyeon
Minhyeon on 16 Mar 2014
Edited: Minhyeon on 16 Mar 2014
Hello all.
I am dealing with the following function such that:
f(x1(theta), x2(x1(theta))) = 0
where x2 is a (implicit) function of x1.
To solve the above equation, I made a code as follows:
============================================================================
y = fsolve(@(theta) myfun1(theta), x0)
where myfun1 is as follows:
function f = myfun1(theta)
x1 = log(3 * theta ^2 + 2 * theta ^3)
x2 = fsolve(@(x) myfun2(x,x1), x00, x1)
f = x1 + x2 - 10
and, finally, myfunc2 is written as follows:
function g = myfun2(x1)
g = log(x1 + x^2 - 10)
============================================================================
The thing is that I need to use fsolve in another function file that is also using fsolve since x2 is implicitly defined by x1.
However, whenever I run this mfile, then I face the following error message.
============================================================================ Warning: Struct field assignment overwrites a value with class "double". See MATLAB R14SP2 Release Notes, Assigning Nonstructure Variables As Structures Displays Warning, for details. ============================================================================
I strongly suspect that there is a problem in the mfile that uses fsolve twice.
Would you please make a comment on this? I sincerely appreciate all your answers.
Best,
Min

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