Function command y = f(x)

So, here's a screenshot of my problem.

http://i60.tinypic.com/20uu4ue.jpg

The upper part is the text from a Matlab Essentials book, and the lower part is where I try the example given in the book.

Why is it giving me an error? What am I missing here?

Answer 1

[Star Strider]

unction definitions of that sort are not permitted in regular script files, only within other function files. You have to create a new script with:

function y = f(x)

as the first line, then save the file as f.m. It should work then.

To call it from your main script:

x = 10;      % Random choice
y = f(x)

Answer 2

[Orion]

because you're trying to declare a function in the command window, which is impossible.

a function can only be declared in a Mfile.