You are reading documentation for the unreleased version of Matplotlib. Try searching for the released version of this page instead?
Applications are open for the 2018 John Hunter Matplotlib Summer Fellowship. Apply now!
Version 2.2.2.post1772+gd9240e24b
matplotlib
Fork me on GitHub

matplotlib.axes.Axes.format_ydata

Axes.format_ydata(y)

Return y string formatted. This function will use the fmt_ydata attribute if it is callable, else will fall back on the yaxis major formatter