The vector projection of the vector v onto a non-zero vector d is the component of v that is parallel to d. In mathematical terms, where is the unit vector in the direction of d. The projection can also be used to find component of v normal (or orthogonal) to d as follows: File:Linear subspaces with shading.svg This linear algebra-related article contains minimal information concerning its topic. You can help the Mathematics Wikia by adding to it.