-: I think I don't have to convince anyone
that data analysis, statistical thinking,
and being able to present what we analyzed
is an important skill.
I want to give you a solid foundation
about data visualization
and a starting point to make better charts
for your presentations and all media you communicate with.
Let me open up by showing you a couple of basics
about the most important charts you should learn about.
And I'm opening up this beautiful list
with the column chart,
which is made up of horizontal bars
stacked next to each other.
A column chart is great
for comparing different categories to each other.
It looks really well
when there are three, four, five categories.
It gets a little messy if there are too many of them.
Next would be the bar chart.
And an easy and simple way to remember
which is the column chart and which is the bar chart,
is someone walking a really, really long walk
from the bar home,
and he needs to walk on top of the bars.
A bar chart is basically a column chart but flipped around.
Why do we do this?
Because we have plenty of space for labeling,
and it really looks good,
even if there are many things to compare.
For example, I'm sure you looked at charts like that,
and this looks perfectly fine.
No matter the data,
you can put plenty of items on top of each other.
The next, who else than the line chart?
The line chart is a beautiful way of displaying data,
especially showing things continuous in time, like trends.
Because we can have plenty of data points
that go on, and go on, and go on,
and a line can display that.
It's good even for plenty of measurement.
Next up, the beautiful, the tasty, pie chart.
Especially graphically, it looks very appealing.
The pie chart has some advantages
because all slices together need to make up 100%,
so it perfectly shows part-to-whole ratio,
but it gets a little difficult
if there are more than four or five slices.
If you have like 10, 12 slices,
it's really not the type of chart you wanna select.
Next up, the area chart,
which is a specialized form of the line chart
if you take a look at it,
but it actually has color below it.
It's used to display two or more quantities,
like sales of two items, making up your entire sales.
What's interesting, it can combine a line chart
and a bar chart below it,
so it's a really interesting form of a chart.
Next up, if we talk about business and finance,
waterfall chart.
This is a form of a column chart,
but actually, the waterfall chart
wants to show you increase and decrease of certain values.
It visualizes the start and finish,
for example, income,
which is changed by expenses, by something, by something,
and at the end the total income is like that,
and the waterfall chart can beautifully display that.
There are plenty of other chart types,
like pictographs, where you show something with icons,
or combo charts,
where you have a column and a line chart
connected to each other,
displaying two different metrics.
We will work on different chart types,
and I will explain everything step-by-step.
This was just a brief introduction
to allow you to dive into the topic
and make your brain prepared for chart knowledge.