Component(A, n)

An explicit algebraic vector in cartesian coordinates

The first and third components

The "nth" component returns unevaluated

Substituting n by something concrete, the component is obtained

Here A_ is an abstract non-projected vector; by default, in the framework of the Physics[Vectors] package, symbols ending with "_" represent non-projected vectors (to change this postfix see Setup:

The second component

When  is replaced by a projected vector, the selection of the component is performed

It is also possible to work all abstract; this is the "nth" component of a non-projected vector

Component admits as argument a generic algebraic vectorial expression, for instance

Note however that when the expression passed to Component is not a vector, the computation is interrupted with an error message

Physics, Physics conventions, Physics examples, Physics/Vectors, Vectors,operations, Vectors/Identify