dimnames

- [Instructor] We've discussed arrays…way back at the beginning of this series.…But in review, an array is a collection of matrices…where each level is a two-dimension array…of values that are the same.…There is a way to add additional information to an array…and that's through the use of a command called dimnames.…So let's look at how that works.…First, let's create an array.…And in order to do that, I need some vectors.…So I'm going to create sample1,…sample2, and sample3.…

And now I'm going to use those samples…to create an array called AnimalPlanet.…Let's take a look at what that actually has done.…So I'm going to come down to the console, clear it,…and type in AnimalPlanet.…And look at the contents of AnimalPlanet.…And what you'll see here is I have three levels,…each level consisting of a two-dimensional matrix,…two rows and five columns.…So AnimalPlanet is a collection of matrices.…

Well, that's great, but this is all very mysterious…as to what these numbers actually represent.…It would be helpful if there were some labels…