I am trying to make a horizontal barplot with just one bar. Here is sample code:
import matplotlib.pyplot as plt
plt.figure(figsize=(4, 1))
plt.barh(['my_value'], height =0.1, width=[-1,1], align='center')
plt.axvline(x=0.8, color='black')
How can I add a diverging color scheme/palette to it? Such that the color transitions from left to right smoothly. Solutions using Seaborn will work too.
You could adapt the solution from the matplotlib tutorial example, provided you create only one bar (instead of two).
Or you could directly use imshow:
import matplotlib.pyplot as plt
import numpy as np
plt.figure(figsize=(4, 1))
plt.imshow(np.linspace(0, 1, 256).reshape(1, -1), extent=[-1, 1, -1, 1], aspect='auto', cmap='seismic')
plt.plot([-1, 1, 1, -1, -1], [-1, -1, 1, 1, -1], color='black') # surrounding rectangle
plt.axvline(x=0.8, color='black', ls=':')
plt.xlim(-1.1, 1.1)
plt.ylim(-1.8, 1.8)
plt.yticks([0], ['my_value'])
plt.tight_layout()
plt.show()
