Simple if statement always gives 0

I'm trying to write a simple function which makes a value either 1 or 0 depending on the input. It looks like this:

function f = W(t)

if 0 <= t < (3/12)

f = 0;

end

if (3/12) <= t <= (8/12)

f = 1;

end

if (8/12) < t < 1

f = 0;

end

if t >= 1

t = t - 1;

end

end

However, no matter what the input is, it always returns zero. What's causing this?

Answer 1

[Alex Mcaulley]

You need to put && between two comparisons as:

function f = W(t)
    if 0 <= t && t < (3/12)
        f = 0;
    end
    if (3/12) <= t && t <= (8/12)
        f = 1;
    end
    if (8/12) < t && t < 1
        f = 0;
    end
    if t >= 1
        t = t - 1;
    end
end

Also note that the last comparison is not returning anything

[Tom Oud]

Fixed! Thanks a lot!