Undefined function or variable 'equationsToMatrix'.

Hi all,

I encountered an issue when I tried to solve the systematic equations.

By following the instructions from https://www.mathworks.com/help/symbolic/equationstomatrix.html, I typed in the exact same codes in to Matlab:

syms x y z
eqns = [x+y-2*z == 0,
        x+y+z == 1,
        2*y-z == -5];
[A,b] = equationsToMatrix(eqns)

However, I got the error:

Undefined function or variable 'equationsToMatrix'.

I did some search and could not find any solutions. Plus, my MaLab software is installed under the C:/ directory.

Any help would be higly appreciated!

Thanks,

-Yili

[Stephan]

your Code works for me.

which equationsToMatrix

what result do you get?

Answer 1

[madhan ravi]

https://in.mathworks.com/help/symbolic/equationstomatrix.html#bteza8k_seealso - released in 2012 b (requires symbolic math toolbox). If you have 2012b or later make sure you have that toolbox installed and have a valid license for it , if it satisfies all the above then the only way is to contact Mathworks support team by clicking the contact us button on the top right corner of this page.