Having no luck with the suggestions I dare to submit it is a bug hoping to get a response from Staff. Afterall the produced message is unclear: what does it mean to 'Use []' in the code that MATLAB generates.?
reshape() error in the function created by matlabFunction()
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matlabFunction() has generated for me AmplAndDers() to be used in fminunc(). The very first objective function evaluation fails:
Error using reshape
Number of elements must not change. Use [] as one of the size inputs to automatically calculate the appropriate size for that dimension.
Error in AmplAndDers (line 93)
Hess = reshape([-t2.*t3.*t4. ... .*(3.0./4.0)],[4,4]);
The signature of the function is:
function [Ampl,GradA,Hess] = AmplAndDers(C1_0,C2_0,R1_0,R2_0,w,x1,x2,x3,x4)
I call it with a w being an array. Two other outputs are returned correctly. I do not understand what does the above suggestion mean:
Use [] as one of the size inputs to automatically calculate the appropriate size for that dimension.
If I manually change the above reshape() call to end with:
...*(3.0./4.0)],[4,4,length(w)]);
the program runs OK.
How can avoid the manual intervention?
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KSSV
2021-8-21
Read the documentation of reshape and understand it. The error is clear, you are trying to create extra elements than present in the array while reshaping.
Example:
A = rand(1,25) ;
B = reshae(A,5,5) ; % 5*5 = 25, no error as same elements present
C = reshape(A,6,5) ; % 6*5 = 30, error as A as 30 elements only.
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