How to define the peaks of a graph?

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Hi @joziask, I think I answered a similar question some time ago:

In scatter plot, create line connecting lowest y values over x

Hi @nogons welcome to the forums. Yes, you can do that. You just have to add a trace with the minimum values: import numpy as np import plotly.express as px # create data arr = np.random.randint(0, 2000, size=(10, 30)) # create base figure fig = px.scatter(arr) # formatting fig.update_traces( showlegend=False, marker_color='black', marker_size=8 ) # add trace with minimum values fig.add_scatter( x=[*range(10)], y=np.min(arr, axis=1), name='minumum', marke…

How do you define a peak, that would be the question.

Scipy has actually module for peak detection:
https://docs.scipy.org/doc/scipy/reference/generated/scipy.signal.find_peaks.html

A first search on stackoverflow shows some example usages:

Counting Peaks in a Time Series