what this error mean

plz what this error mean ?

Error: Function definitions are not permitted in this context.

Answer 1

[Star Strider]

It means that you need to save your function as a seprate function file (a ‘.m’ file with the same name as your function) on your MATLAB search path.

See the documentation on Function Basics (link) for a relevant discussion.

Answer 2

[madhan ravi]

When you are using version prior to 2016b a function definition cannot be included in a script (reason of your error) , therefore you need to save it in a separate file with the same name of a a function. Keep in mind you cannot paste a function in command window (in any versions of matlab).