How to fix unrecognized function of variable allshifts?

If you're encountering the error message "unrecognized function or variable 'allshifts'", it means that MATLAB is unable to find a function or variable by that name. This could be because allshifts is not a built-in function, hasn't been defined in your script, or isn't located in a directory that MATLAB is currently accessing.

To resolve this issue, you might find the following resources helpful:

Understanding how to create functions in MATLAB: MATLAB functions allow you to encapsulate a series of commands into a single, callable entity. This can greatly enhance the readability and reusability of your code. For a comprehensive guide on creating functions, refer to the official MATLAB documentation: https://www.mathworks.com/help/matlab/ref/function.html
Learning through video tutorials: Sometimes, a visual explanation can be more intuitive. This MATLAB video tutorial covers functions and subfunctions, providing clear examples of how to define and use them effectively:https://www.mathworks.com/videos/functions-and-subfunctions-97413.html
Guide to creating and managing variables: Variables are fundamental in MATLAB, used to store data that your functions and scripts can manipulate. Understanding how to create and edit variables is crucial. You can start with these guides: https://www.mathworks.com/help/matlab/matlab_env/create-and-edit-variables.html
Getting comfortable with MATLAB: If you're new to MATLAB or looking to strengthen your foundation, the MATLAB Onramp course is a fantastic, free resource that can help you get up to speed with the basics of MATLAB programming: https://matlabacademy.mathworks.com/details/matlab-onramp/gettingstarted