Histograms in Tableau | Tableau Charts

0:00Hey, it's Tim here. In today's video, I'm

0:01going to show you how to build a histogram

0:03in two minutes.

0:04Let's get stuck in. So here I have life

0:06expectancy data from the World Health

0:08Organization,

0:09and I want to look at the value of life

0:11expectancy. And to create a histogram, we

0:13typically create

0:14them because we want to look at

0:15distribution. So let me go ahead and do

0:17something here

0:18called creating a bin. What a bin does is

0:20essentially groups up the values in the

0:23data

0:23into grouping. So for this, we'll group

0:25life expectancy into buckets of roughly

0:27five,

0:28and go ahead and select OK. And that's

0:30pretty much it, you'll see that we now have

0:31a new item

0:32just here on the top left hand side. Let's

0:34go ahead and drag that onto columns. And

0:36you'll see

0:36that we have our groupings. Some rows have

0:38no data, that's what now means. And the

0:40data typically

0:41starts from 30 upwards. So the first

0:43grouping is actually 30 to 35. The simplest

0:45analysis we can do

0:46here is just look at the all the records

0:48and see how they sit inside of our data.

0:51And we have a

0:51histogram. It's that simple. But we want to

0:53do some data storytelling here because this

0:55data looks

0:56over multiple years. If I go and drag the

0:58year onto filters, you'll see that it doesn

1:00't let me

1:01select one year on its own. This is because

1:03this is a continuous field at the moment.

1:05That's why

1:05we're getting everything here is to do with

1:07ranges. So let's go ahead and hit cancel.

1:09Go back to the year field, click on this

1:11little drop option, and select convert to

1:14discrete. And

1:14now when we drag it in, it allows us to

1:16select each individual year, we'll go ahead

1:18select 2015,

1:19click OK. And now you can see it's filtered

1:21to the most recent year. The other thing

1:24you can do with

1:24histograms, you can add context to them.

1:27For example, what impact does adult

1:29mortality have

1:30on life expectancy. So let's go ahead and

1:32create yet another bin for this one. We'll

1:35do this in

1:36buckets of let's say, let's do 50. Let's do

1:3850. Because I think that makes the most

1:40sense.

1:41Essentially, the adult mortality is

1:43measured as a percentage out of 1000. So if

1:4650 out of 1000,

1:47people are passing away, that's sort of a

1:48rough percentage, if that makes sense. So

1:50let's go

1:51ahead and instead of putting that into

1:52another histogram, let's put it on colour.

1:54And you can see

1:56the higher the mortality adult mortality,

1:58the lower the life expectancy tends to be,

2:00you can see

2:00that the rates over here on the right hand

2:02side 450 per 1000 people in the population

2:06is extremely

2:06high. Now the final piece of data

2:08storytelling we can do here is just move

2:11this filter up to the

2:12page itself, the page itself allows you to

2:14play through the different years, I'll move

2:16my face to

2:17the top left here. And now when we hit play

2:19with tableau's animations, we can see the

2:21story

2:22unfolding in front of us. And as countries

2:24lower their adult mortality rates, life

2:26expectancy is

2:27going up just one of the many factors that

2:29influences that particular value. Thanks

2:32for

2:32watching, and I'll catch you in the next

2:33video. If you're not subscribed yet, please

2:35do so and I'll

2:35see you soon. Transcribed by https://otter.

2:37ai

2:37Transcribed by https://otter.ai

2:41[ Silence ]