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I am having problem understanding vectors. If a unit vector points in the direction of $z$ axis, then what coordinates would it have?

The paper I read says $x$ and $y$ but if it is in the direction of $z$ axis, shouldn't the coordinate be just the $z$ axis?

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    A unit vector pointing along the z-axis is indeed $\left(0,0,1\right)$.2012-06-23
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    Maybe 'In the direction' means 'to', that is a vector parallel to the $xy$-plane and perpendicular to the $z$-axis. Or not?2012-06-23
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    Startup Crazy: *You can't edit a new question into an already existing one*. You need to make a new question post.2012-06-23

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