Visualization by compressing high dimensions into two dimensions with regression analysisSelf Organizing Map (SOM) is the method that put together many factors into two factors. The use is similar to Principal Component Analysis.
We can use the scatter plot for analysis because the dimension is changed into two.
The comments collected by brainstorming are often devided into some groups. The map made by SOM is similar to this approach. In other words, the information of the position in the map not useful. But sets of the samples as blocks have useful information.
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