# Show x axes with intervals of X instead of default (this case default=5)
import numpy as np
import matplotlib.pyplot as plt
x = [0,5,9,10,15]
y = [0,1,2,3,4]
X = 1.0
plt.plot(x,y)
plt.xticks(np.arange(min(x), max(x)+1, X))
plt.show()

# import the libraries
import numpy as np
from matplotlib import pyplot as plt
# create the data values to plot the graph
x = np.array([1, 2, 3, 4, 5, 6])
y = np.array(2 * x + 2)
z = np.array(2 * y + 1)
yticks = [0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50]
Y = 5
# plot the graph using matplotlib
plt.title('Line graph for the equation y=2x+2')
plt.xlabel('X_axis')
plt.ylabel('Y_axis')
plt.plot(x, y, linewidth=2, color='red', marker='.', markersize=7)
plt.yticks(np.arange(min(yticks), max(yticks) + 1, Y))
plt.grid()
plt.show()

#x-ticks:
plt.xticks(start, stop, step))
#y-ticks:
plt.yticks(np.arange(start,stop,step))

locs, labels = yticks() # Get the current locations and labels.
>>> yticks(np.arange(0, 1, step=0.2)) # Set label locations.
>>> yticks(np.arange(3), ['Tom', 'Dick', 'Sue']) # Set text labels.
>>> yticks([0, 1, 2], ['January', 'February', 'March'],
... rotation=45) # Set text labels and properties.
>>> yticks([]) # Disable yticks.