Round to Significant Figures using Power Query

Hi  Community!   I've created a custom function in power query to round to any significant figures you need. IT solves this type of issues that scientists usually face, that is explained here: 

https://study.com/learn/lesson/significant-figures-scientific-notation-overview-rules-examples.html 

These is a sample of the output:

here is the function: Function_final_7.txt

1. Open power bi and click 'Transform Data'
2. Click 'New Source' -> 'Blank query' and paste the function
3. Rename to 'Format_to_sigFig'
4. Click 'Add Column'-> 'Invoke Custom'-> column name as 'Fixed'-choose function column and the num as the text column and the sigfig column
5. Click ok-> Transformation is done and you can grab the column in your visual. Close & Apply