optimization problem of areas

Question

Daniele Sonaglioni 2020-11-25

评论： Matt J 2020-11-25

Hi everyone,

I'm trying to minimiza and area. In my problem I have an exerimental curve and a polynomial and i want to minimiza the area between the two.

I have tried with this code but it does not work very well:

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x=( Cp5_diff(m(1):c(1))-polyval(z,T10(m(1):c(1))) );
Area2=@(z) sum( ( x.*dt(m(1):c(1)) ) );
best_z=fminsearch(Area2,z);

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Do you have any suggestion?

Thank you!

Answer 1

Matt J 2020-11-25

编辑：Matt J 2020-11-25

Your objective function Area2 is written to be a function of z, but nothing in

sum( ( x.*dt(m(1):c(1)) ) )

depnds on z. Perhaps this is what you intended,

x= @(z) ( Cp5_diff(m(1):c(1))-polyval(z,T10(m(1):c(1))) );
Area2=@(z) sum( ( x(z).*dt(m(1):c(1)) ) );

Thank you very much! Your suggestion was right and now my code works!

Matt J 2020-11-25

I'm very glad, but please Accept-click the answer to indicate that it resolved the problem.