why does it not work on my matlab this example from the book

Here are an example with matlab elseif and my attempt to rewrite it without success:

http://bildr.no/view/1000883

http://bildr.no/view/1000884

This is my script:

y=calcy(x)

if x<-1
    y=1;
elseif x<=2
    y=x^2;
else
    y=4;

end
end

And why do they need two end. What are the two things they are ending?

Answer 1

[David Young]

The second end is the end of the function. If you run the code outside a function, you must omit it.