## WeBWorK Main Forum

### Re: Evaluate a multi-dimensional formula at a point

by Davide Cervone -
Number of replies: 0
To get the coordinates of a vector, you can do either
    ($x,$y,$z) =$v->value;

as in the example above, or you can get individual coordinates (by number) as

    $x =$v->extract(1);
$y =$v->extract(2);
$z =$v->extract(3);

Davide