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number_line.py
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number_line.py
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"""
read excel file "Jahrestag.xlsx"
and genrate a number line of years
"""
import numpy as np
import pandas as pd
import matplotlib.pyplot as plt
import matplotlib.ticker as ticker
# Setup a plot such that only the bottom spine is shown
def setup(ax):
ax.spines['right'].set_color('none')
ax.spines['left'].set_color('none')
ax.yaxis.set_major_locator(ticker.NullLocator())
ax.spines['top'].set_color('none')
ax.xaxis.set_ticks_position('bottom')
ax.tick_params(which='major', width=1)
ax.tick_params(which='major', length=5)
ax.tick_params(which='minor', width=0.75)
ax.tick_params(which='minor', length=2.5)
#ax.set_xlim(-0.5, 5.5)
ax.set_xlim(1900, 2030)
ax.set_ylim(0, 1)
ax.patch.set_alpha(0.0)
def main():
fname = "./Jahrestage.xlsx"
df = pd.read_excel(fname)
plt.figure(figsize=(8, 6))
# Multiple Locator
ax = plt.subplot(8, 1, 1)
setup(ax)
ax.xaxis.set_major_locator(ticker.MultipleLocator(10))
#ax.xaxis.set_minor_locator(ticker.MultipleLocator(0.1))
#x_arr = [0, np.euler_gamma, np.sqrt(2), np.pi]
x_arr = [x.year for x in df["date"].to_list()]
y_arr = np.full(len(x_arr), 0.2)
ax.plot(x_arr, y_arr, "ro")
plt.show()
if __name__ == '__main__':
main()