Using Koala to reduce the unnecessary sheets of excel file

[haowang0402]

Dear authors of Koala,

I really appreciate your work of Koala to speed up the operations of Excel, and I think Koala could be a great help for my project, but I don't know exactly how I should do it. If you can offer some insights, that would be very helpful.

In a large Excel spreadsheet, there could be many intermediate sheets used for calculations, but we don't need it for presenting our final result. For example, "Sheet1!A1 = Sheet2!B1", and "Sheet2!B1 = 5". In this way, we don't need Sheet2 but only "5". Therefore, I want to compress the computation chains in a text file, and I use networkx to convert the whole spreadsheet into a gigantic graph.

First, I use Breadth First Search to iterate over the whole spreadsheet, and then I can figure out the sinks(those don't depend on other cells to get the value) of the graph. After getting the sinks, I can back-propagate the values to update all the cells. However, I used Formulas to evaluate the expression, but it does not support date-related functions. Therefore, I am wondering can I use Koala to replace Formulas to evaluate given expression, also could you please offer any advice for how I can speed up the whole calculations? Thank you very much!

Best,
Hao Wang