How to use 'ident' operation?

While I study on Simulink, i don't know that 'ident' operation is not implemented even thogh i watch vedio clip ( https://kr.mathworks.com/videos/control-design-made-easy-82400.html ). My matlab version is R2017b ver. Is it because of this version ? I want to use 'Data Driven Modeling'. Please help me that.

[Stephen23]

I cannot find any reference to an ident operation, function or class, but perhaps you are referring to the System Identification Toolbox?:

https://www.mathworks.com/help/ident/

Just like any other toolbox you will only be able to use it if it has been installed and you have a valid license for it.