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

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Tor Fredrik Hove 2011-10-15

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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?

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David Young 2011-10-15

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

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