Matplotlib ytick's absolute value

Question

In matplotlib, how can I use absolute value in the yticks?

For example, 100, 50, 0, 50, 100, 150.

Answer 1

Take the current ticks using get_yticks, modify that and then use set_yticklabels. See the example below.

%matplotlib inline
import matplotlib.pyplot as plt
from math import trunc
a = np.random.rand(100)*30-20

plt.figure()

fig,ax = plt.subplots()

ax.bar(np.arange(len(a)), a)

ticks =  ax.get_yticks()

# set labels to absolute values and with integer representation
ax.set_yticklabels([int(abs(tick)) for tick in ticks])

plt.show()