Function M-Files Help

I am a first time MATLAB user and to be honest, am really struggling. So if anyone could help break this down for me into small, easy steps, it would be very appreciated.

I am trying to create a function m-file. But before I went to the specific problem, I used a test code I found to get the hang of what I was supposed to be doing. (The example was found online and copied down to test).

This is my code:

     function  y  =  dude(x)

     y = x.^2 + cos(x);

However, MATLAB is telling me there is an invalid statement. It is the exact same code as the example and there are no warnings found in the program. Is there something that I am overlooking?

Answer 1

[Azzi Abdelmalek]

your code is fine, maybe you did'nt call the function correctly

example, to call your function, go to matlab command, then

 y = dude(4)

%or

y=dude([1 4 5])

[Annie]

When I do so, I get the error:

Undefined function 'dude' for input arguments of type 'double'.

[Azzi Abdelmalek]

check if your file is saved in your working path

Answer 2

[Annie]

When I do so, I get the error:

Undefined function 'dude' for input arguments of type 'double'.