 The next group of visualizations we want to take a look at are for representing hierarchies or how categories nest within others. The first one we'll look at goes by kind of a peculiar name is called a tree map. It makes sense if you think of tree as the hierarchy where you have branches branching off of each other, and a map because it's filling it in it's this one right here with all the squares. And so I'm going to click on that one tree map. And I'm going to use the cocktail data for this. So I'm going to come back up to the top here. I've got the cocktail data open. I'm just going to put it into the table view because I like that a little better. Again, it shows us the cocktail. It shows us the ingredients and the parts or proportions of each ingredient in the cocktail. So let's come down here. And we have four boxes or bins that we can put things into. Let's start by saying the hierarchy itself the stuff that is nested within each other. I'm going to first take cocktail. So that's the drink. And then you can see that it fills in right here. So we have the different drinks listed that are in the data set. And the sizes here are sort of arbitrary. So I'm going to come back up here and I'm now going to pick ingredient that goes into each one. I'm going to bring that over and put that also under hierarchy. And now you see that each one of these is broken up into the ingredients that go into it. But each of these areas is basically of the same size. So these ones are two ingredients, but it's giving them the same size, three the same size, four, five, and then this is seven ingredients of approximately the same size. But we know from the parts that that's not how it's supposed to be. So I'm going to take parts, which represents the proportions of each ingredient, drag that over here to size. And now you can see the relative proportions. So for instance, right here, we got a lot of whiskey and a little bit of mint and a little bit of sugar. And then if you want to see what the actual cocktail is, we can come up to color, which is over here, and we'll drag in the name of the drink. So that is actually showing up in two different places. It's showing up both in the hierarchy because the ingredients are nested within each one and it's showing up over here under color. And so now we can use this map over here. It's a little hard to differentiate some of the shades, but you get the idea what's going on here, that it gives you an indication of what's going into what and the proportions in each of these again are determined by the parts or the amount of each ingredient in each drink. And so it's a neat way of showing how things are nested within one another, as well as seeing the complete set in one rectangular image, which is usually really easy to display on a computer screen. And that's why tree maps have become really popular for showing a lot of nested categories. And that's their great strength, both in general and here in raw.