Solve nonlinear least square problem with MIT app inventor

[ABG]

The AI2 spreadsheet component can add data to a sheet, including =function() expressions.

I do that in this sample ...

Logging Marathon Runner Checkpoints in Google Sheets

This sample is intended to show how to use Google Sheets aggregation functions like MAXIFS to summarize multirow log data into single line summaries. This sample uses the New York City Marathon as a base, though it probably can't scale to the 53,000 runners. It is based on three sheets: Checkpoints, a list of locations each runner must cross on his route Mileposts, a detail list of runner checkpoint timestamps Runners, a master list of runners, with identifying bar codes and stats Checkpoin…

Can you find the google range expression for that statistical function?