How to create TreeMap chart with Golang via C++

Possible Usage Scenarios

A treemap chart provides a hierarchical view of your data and makes it easy to spot patterns, such as which items are a store’s best‑selling products. The tree branches are represented by rectangles, and each sub‑branch is shown as a smaller rectangle. The treemap chart displays categories by color and proximity, and can easily show large amounts of data that would be difficult to represent with other chart types.

TreeMap chart

After running the code below, you will see the treemap chart as shown.

Sample Code

The following sample code loads the sample Excel file and generates the output Excel file.