Decision tree is an algorithm for solving classification problems. This article will introduce what a decision tree model is, its common uses, and how to use the "Edraw Illustration" software to draw a decision tree model.
The decision tree model (decision tree) is a simple, efficient, and highly interpretable prediction model. It is generally generated top-down. Each decision or event ( That is, the state of nature) may lead to two or more events and lead to different results. When drawn as a graph, this kind of decision branch looks like the branches of a tree, so it is called a decision tree. Another expression is to use a tree diagram to represent the expected value of each decision. Through calculation, the decision-making method with the greatest benefit and the least cost is finally selected. This model is currently widely used in the field of data analysis.
Characteristics and common uses of decision trees
Although the decision tree model is more difficult to predict continuous fields, However, using the decision tree model can generate understandable rules, the calculation amount is not large, and it can also clearly display which fields are more important. It can produce feasible and effective results for large data sources in a relatively short period of time. Therefore, in the modern enterprise management process, the decision tree model has been widely used by enterprise decision makers and analysts.
Of course, as the most common decision-making method, in addition to investment management, the decision tree model can be used in the policy selection of government agencies and even in the setting of our personal goals.
Composition of decision tree
The decision tree algorithm adopts a tree structure and uses layer-by-layer reasoning to achieve the final classification. The decision tree is composed of the following elements:
(1) Root node: refers to the complete set of samples;
(2) Internal node: refers to the corresponding feature attribute test;
(3) Leaf node: refers to the representative The result of the decision
is shown in the figure:
Decision tree model drawing method
There are many software that can draw decision tree models, let us use them together" EdrawMax" can quickly create a decision tree model in a few simple steps.
First, open the Edraw PC version or "Edraw Online Version" and prepare to draw the decision tree model:
The second step is to search for "decision tree model" in the search box at the top of the page, then select the style you like from the rich template library and click "Use" to open template.
The third step is to change the content of the text box on the basis of the template, add conditions and new results in your own decision-making, you can use the symbols and relationships in the "Symbol Library" Lines, etc. can be added, and redundant graphics and text boxes can also be deleted.
Step 4: Use "connecting lines", picture frames and other elements to recombine and modify to complete the work.
The fifth step, after completing the drawing of the decision tree model, you can click the save, download, print, share and other buttons in the upper left corner to store the drawn decision tree model. Works can also be exported to images, PDF, PPT and other formats.
Decision tree model design software—EdrawMax
Edraw Diagram is a simple and easy-to-use graphic expression workbench designed by a Chinese company. It can not only draw hundreds of graphic charts in professional fields such as flow charts, architecture diagrams, engineering drawings, and mind maps, but also provide a Use the whiteboard for brainstorming and arbitrary arrangement to easily visualize data and ideas. Supports Windows, Mac, Linux and web versions, creating on one end and synchronizing on multiple ends.
Using "Edraw Icon" drawing design software, you can directly apply your favorite templates in the rich template library to help you work efficiently and conveniently. You can also use the software's built-in rich symbol library (you can add symbols) and the operating methods that are in line with Chinese authors to create and collect works that highlight your personality.
Why choose Edraw to draw the decision tree model
1. Rich template library
Edraw The diagram contains templates for a variety of graphs and charts, and decision trees are no exception. By applying templates, we can improve our efficiency.
2. The software functions are simple and easy to operate.
The software interface is all in Chinese, and the operating style is very similar to Office, which is in line with the operating habits of Chinese people. There are a variety of symbol materials, and functions such as drag-and-drop operation and automatic alignment are easy to use.
3. Strong compatibility
Compatible with mainstream office software formats (Office software, PDF...), and supports the export of Visio, vector graphics, pictures and other formats.
4. Wide range of operating platforms
It is compatible with Windows, Mac, and Linux systems (including domestic operating systems), and can also be drawn online (web version), providing options for cross-end office work.
5. Bring your own cloud disk
The files being produced can be saved in the cloud at any time while connected to the Internet, so that we can quickly find the files next time, edit and save them again.
6. Free trial available
After the first download, you can try it for free for 30 days. We can fully experience the fun of the software, and the subscription fee is cheaper than the same type of foreign software.
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