Bug summary

I arrange the ticks of an axis with the "set_ticks" method and then use "set_major_formatter" to specify the decimal number. The "set_major_formatter" method resets the arrangement I previously made with "set_ticks"

Code for reproduction

import numpy as np
import matplotlib.pyplot as plt
from matplotlib.ticker import FormatStrFormatter

line = [5.123, 4.123, 3.123, 2.123, 1.123, 0, 1.123, 2.123, 3.123, 4.123, 5.123]

y = np.arange(len(line))

fig, ax = plt.subplots(1)

ax.plot(line, line)

ax.xaxis.set_ticks(ticks = np.sort(line), labels = line)
#comment/uncomment the following line to see the issue
ax.xaxis.set_major_formatter(FormatStrFormatter('%.1f'))

Actual outcome

I arrange the xticks but do not change the decimal number.

I remove some decimal number, but the arrangement on the x ticks disappears.

Expected outcome

to obtain the expected outcome I must substitute:

ax.xaxis.set_ticks(ticks = np.sort(line), labels = line)
ax.xaxis.set_major_formatter(FormatStrFormatter('%.1f'))

by

ax.xaxis.set_ticks(ticks = np.sort(line) , labels = np.array(["{:.1f}".format(line[i]) for i in range(len(line))]))

Additional information

No response

Operating system

windows/Linux

Matplotlib Version

3.5

Matplotlib Backend

Qt5Agg

Python version

3.7.12

Jupyter version

No response

Installation

None