[data visualization] Apache superset 1.2.0 tutorial (III) - detailed explanation of chart functions

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Through the previous chapters , We have successfully installed superset, And connect mysql database , Visualizing the data of the king hero . Using the simplest Table Type of chart , however superset It also supports a lot of chart types .

In this article, we will demonstrate each chart type one by one , The article is longer , Suggest reading after collection .

Chart classification

Superset A large number of charts are provided to help us Data visualization .

The types of charts can be divided into the following categories ：

• Time series chart ： These graphs show data over time , It's best used to find trends . Examples of time series diagrams include line charts 、 Time series bar charts and so on .
• Combination chart ： These types of graphs show the distribution of data in specific areas , for example “ most …”、“ least …” and “ front 10 name ” Type of chart . Examples of composite graphs include bar graphs 、 Pie and tree charts .
• Distribution map ： This kind of chart shows how data is distributed in one or more fields , Best for data with multidimensional properties . Examples of distribution maps include histograms 、 Box lines and levels .
• The diagram ： This kind of chart shows the relationship between two or more variables , Usually used to convey commonalities 、 Non generic or causal types . Examples of diagrams include PivotTables 、 Heat and bubble charts .
• Geospatial charts ： This kind of chart shows data based on geography .superset It also provides a variety of services based on deck.gl The geospatial chart of .

Only if you choose the right chart , In order to accurately convey what you want to express . So how to determine the chart type ？

The first thing to consider is what you want to achieve , A good chart must be able to clearly express the answer to the question . Here are some criteria for selecting tables , For reference ：

• When you want to show how data changes over time （ for example , Changes in product sales in the last quarter ） when , Please use Time series chart .
• When your data focuses on a single factor （ for example , Number of graduates 、 The most popular cities, etc ） when , Please use Combination chart .
• Use... When your data is assigned to different categories Distribution map （ for example , The distribution of the number of people in a certain interval ）.
• Use... When you compare between two or more values The diagram （ for example , Compared to the temperature change , sea level rise ）.
• When your data depends on geography （ for example , The population density of the city 、 Air traffic routes, etc ） when , Please use Geospatial charts .

Data set preparation

For these charts , Different data sets are prepared for visualization operation . Namely ：

Time series chart ： “ Big Joe ” key word , Search index change data in the past month .

Combination chart ： The ranking of the maximum health value of each hero of the king .

Distribution map ： The maximum health value of each hero of the king , Statistics on the number of heroes in each health interval .

The diagram ： Take a look at the relationship between the greatest defense and the greatest life .

Geospatial charts ： Here's a simple visualization of the number of new crown diagnoses in the United States and India .

Let's explain the usage of different types of charts ：

One 、 Time series chart

First, prepare the data . The data comes from Big Joe's search index data .

First of all to enter Datasets page , Add this table to .

After the table is successfully added , Get into Charts page , Create a new chart .

Select chart type as Time-series Bar Chart

New chart

Go to the chart settings page , Here you can make a series of settings for the chart , First change the name .

The statistical index of the default table is COUNT, This is changed into SUM.

Modify the time frame , The default is LAST WEEK.

You can also make some custom settings , Color , Axis and so on .

preservation , such , The time series diagram is completed successfully .

Two 、 Combination chart

This data source uses King hero data , It's related to . Now let's use this data to make a pie chart .

First, create a new chart , Select type as Pie Chart

Choose a good data source

Make the basic settings , Here are the heroes , The statistical dimension is the largest life

Make some custom settings

Click on RUN Inquire about , So the pie chart is done .

3、 ... and 、 Distribution charts

Still using King hero data , Make a histogram

First, create a new chart , Select chart type as Histogram

Make some custom settings

Select statistics column as The greatest life , Adjust the interval .

You can clearly see the distribution of the maximum health value .

Click on RUN Inquire about , So the histogram is done , preservation .

Four 、 Relationship charts

Still using existing data

choice Heatmap Type chart

Then do some basic setup ,X Axis selection maximum object defense

Y Axis chooses maximum life .

Click on RUN Inquire about , So the heat map is done , preservation .

5、 ... and 、 Geospatial charts

Prepare the data , Select chart type as World Map

Make some settings , Country code , Statistical columns and so on .

Click on RUN The query , preservation .

Through this paper , We're right superset We have a basic understanding of the various charts in .superset What other functions are there ？ The next chapter goes on ~

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