Optimizing functions involving higher dimensions?

I want to find minimum for function in higher dimension. I found minf_lbfgs() in tensorlab but it requires me to give gradient. Are there any tools which give me result without calculating gradient.

x = fminsearch(fun,x0) works only when x is matrix (or less).

Answer 1

[Torsten]

Check out

https://de.mathworks.com/products/optimization.html

Usually, providing the gradient in MATLAB codes from the Optimization Toolbox is optional, but not necessary.

Best wishes

Torsten.

[Rohit Gupta]

It works only till x is a matrix. If I give higher dimension it shows error!

[Torsten]

Then make the matrix a vector:

x = x(:)

Best wishes

Torsten.