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Tree map: tree view - draw covid-19 array diagram
2022-07-07 04:49:00 【Mrrunsen】
Tree Map Tree view , visualization
Pie chart is used to show the proportion of each data in the total , But when the number of data individuals is large , When the scale difference is large , The pie chart cannot be well displayed . The tree view is a visual way to show the data ratio through the space filling proportion . It can well reflect the evaluation of data , Visually display the proportion of data with different properties .
19 Accumulated in countries COVID-19 epidemic situation
end 2020-4-4 Japan 16 when
Illustration :
tree map The area of the rectangular card shows the COVID-19 condition .
The size and order of the rectangle are calculated .
According to the size of the data , The largest rectangle almost occupies a separate area .
There are many different algorithms for calculating matrix shapes , To reflect different data evaluation perspectives .
The usual way is :
Treat the largest data as 1, Other data calculate the matrix size through ratio .
Due to the relatively small amount of other data , Therefore, the data structure can be displayed through such a tree view . The sub matrix graph created , It can also be used as a new subset attribute .
Color is only used to distinguish different data
Code implementation
1
Data sources
Data sources :
4 month 4 Japan 16 when People's daily new media
2
Data import
Import the sorted data into
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