B4J Library [B4X][Class] Chart analysis

As i could not find any ready code to make analysis of the curve\chart\data flow, i have tried to make something. It was discussed here (thanks to all in the thread!)

If to have a chart, i mean, the data table with 2 columns, say weather temperature per hour - it would be good to have an analysis code that can check the data changing trend and return some result.
Say, the result may be like "Temperature is rising during 5 hours", or "Warning: sudden freeze for -20 degrees during 5 hours !" ...

This is first my result of such class, tested in B4J mainly, and in B4A. I do not have B4i (i guess, should work as no platform specifics).


The project depends on:

• SQLite lib
• DBUtils code module
• For visual testing: xChart lib

Spoiler: Screenshots

The whole project with the class file is attached.

Any feedback, example of .csv data files, donates are welcome.

Spoiler: History:

v.0.26
Class file v.0.18

 

[peacemaker]

The class is reworked very much, to v.0.26.
Added some automated subs for analyzing the charts, including the approximation curve and human-like description of the analyzed chart.

The calculation results are now in the TrendResult type object that helps to create any new analyzing subs, basing on my first example subs.

 

[peacemaker]

The excellent source of the charts to try to analyze - it is the code of the stock ticker https://www.b4x.com/android/forum/threads/?-b4x-xui-b4xpages-simple-b4j-stock-ticker-app-code-using-json-rest-api-newer-developers.127756/