How to find the peak coordinate from dataset

Question

I have a group of dataset.

This is the graph I draw using this dataset. How to find the coordinate of peak value from this dataset? Anyone got good java algorithm regarding this issue?

Answer 1

For this dataset specifically, I would do the following:

1. Make the data stationary by taking first differences
2. Signal when the data is above some threshold level. You can use a fixed threshold or an adaptive threshold (as in this answer for example)

When I use the dataset from this question, for illustration purposes, I get the following in Excel:

That should be easily implementable in Java.

Good luck!