'lqr' requires Control System Toolbox.

I've tried every possible option to check the error in this simple code. But Matlab throws me this error:

'lqr' requires Control System Toolbox.

Error in LST_lqrhw (line 19)

[K, S, e] = lqr(A, B, Q, R);

Can anyone help me with this or suggest an alternate method?

clear

clc

close all

A = [0 1;

1 1];

B = [1;

0];

Q = [1 0;

0 1];

R = [1;

0];

[K, S, e] = lqr(A, B, Q, R);

Answer 1

[Ameer Hamza]

This means that you need to install the Control system toolbox: https://www.mathworks.com/help/control/. MATLAB has several toolboxes, and you need a license for a toolbox you use it in MATLAB.

You can run the following line

ver control

and if it throws a warning, then it means that you don't have the toolbox installed.

[Anil Mohan]

Thank you so much! That just worked perfectlyk fine.

[Ameer Hamza]

I am glad to be of help!