How to download missing functions?

Working with R2018a, and I'm trying to run a file that contains functions like rows(...) and lag(...), but they aren't installed in Matlab for me. Is there a way for me to download these (and any other functions) so that the code can run?

[OCDER]

Do you have the Database Toolbox?

https://www.mathworks.com/help/database/functionlist.html

To confirm license, try this. If it returns 1, it's strange that rows and cols doesn't work. If it returns 0 + bunch of errors, and you do have the license for it, ask Mathworks how to activate that toolbox license.

license checkout Database_Toolbox

[Naomi Li]

Thanks for your help! I just tried it and Matlab returned 1. Any ideas on what might be the problem?

[Stephan]

which rows
which cols

What is the result?

[Naomi Li]

'rows' not found 'cols' not found

[Stephan]

I suggest to reinstall. If this doesnt help, contact support.

With

ver

you find installed toolboxes.

Best regards

Stephan

[Naomi Li]

Thanks! How do I reinstall a toolbox?

Answer 1

[Stephan]

Follow this:

https://de.mathworks.com/matlabcentral/answers/101885-how-do-i-install-additional-toolboxes-into-an-existing-installation-of-matlab

Best regards

Stephan

Answer 2

[JAMAL ADAM]

i try to run smulink but does not work proparly and show me this (Warning: Unable to load Toolbox Path Cache C:\Users\44747\AppData\Local\MathWorks\MATLAB\R2022a\toolbox_cache-9.12.0-128096741-win64.xml. The cache file is not in the correct

format. It will be regenerated upon quitting MATLAB.)

i am already instaled 2022a in pc . how i can fixt it?

thanks