MATLAB: Error in optimset function

# gradobjoptimset

I am taking Machine Learning course from Coursera. When I run the code in MATLAB(R2017), I am getting error in some optimset function. Error is copied below:

Error using optimset (line 255) Unrecognized parameter name 'GradObj'. Please see the optimset reference page in the documentation for a list of acceptable option parameters. Link to reference page.

How do I resolve this issue.

Regards Ridhima Kumar

Best Answer

GradObj is not a valid option to optimset() unless a license is present for one of the following products:

Optimization Toolbox
Curve Fitting Toolbox
Statistics and Machine Learning Toolbox
Computer Vision Toolbox
System Identification Toolbox

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MATLAB: Error using optimset. Unrecognized parameter name ‘large’.

In release R2013a, Optimization Toolbox introduced a new option named Algorithm that replaced an option named LargeScale. See the second item in the Release Notes for that release. At some point between release R2013a and the current release, the Optimization Toolbox functions stopped accepting LargeScale. [My guess is that it was when many more options were renamed in release R2016a.]

The item in the Release Notes to which I linked describes which Algorithm value corresponds to which old LargeScale value. Make that replacement in the code and it should work in both release R2013a and release R2016a.

[SL: edited to fix link to Release Notes.]

MATLAB: Error “Too many output arguments” from fmincon

Do you mean I choose 'on' for the option "GradObj'' and 'GradConstr' and need to switch them to 'off'?

Either switch them off or provide the gradients, e.g.,

function [obj,grad] = e1_funcOptimal(x)
     obj = -x(1,10);
     
     if nargout>1
       grad=zeros(size(x)); 
        grad(1,10)=-1;
     end
 
end

Best Answer

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MATLAB: Error using optimset. Unrecognized parameter name ‘large’.

MATLAB: Error “Too many output arguments” from fmincon

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