Undefined function or variable 'optimoptions' in Matlab

Question

I use this from the documentation:

options = optimoptions(\'fminunc\',\'GradObj\',\'on\',\'Hessian\',\'on\');

and for some reason I get this er

Answer 1

The function optimoptions was newly introduced in MATLAB R2013a. It might be the case that you are using an older version of MATLAB. If so use optimset instead of optimoptions.