Help in defining fmincon fucntion - Optimization Toolbox

I am unfamiliar with working of MATALAB so I need some basic help in using this function.

I want to make my function zero or near zero (It could be negative value but it should be a value nearest to zero)

The other constrains is the all variables should be in between 0.3 to 0.7. Its values can have up to 10 digits after decimal points e.g 0.54465941365)

Problem Its not giving me a value that could give a near zero value.

Thankyou

Here is my Problem Setup

Objective function: @myfun

Derivatives: Approximated by Solver

Start point:[0;0;0;0;0]

A: Empty b: Empty

Aeq: Empty beq:Empty

Bounds:

Lower: [0.3;0.3;0.3;0.3;0.3]

Upper: [0.7;0.7;0.7;0.7;0.7]

Nonlinear constraint function: Empty

Derivatives: Approximated by solver

Options: Default

Results

Objective function value: -390.45426224401234

Local minimum found that satisfies the constraints.

Final Points

Variable 1.0 = 0.6

Variable 2.0 = 0.3

Variable 3.0 = 0.6

Variable 4.0 = 0.3

Variable 5.0 = 0.6

Answer 1

[Walter Roberson]

fmincon is a minimizer, not a 0 finder.

You could minimize @(x) myfun(x).^2

Answer 2

[Alan Weiss]

To expand upon Walter's answer, use lsqnonlin instead of fmincon.

Alan Weiss

MATLAB mathematical toolbox documentation