matplotlib how to start ticks leaving space from the axis origin

问题

I need to plot non-numeric data against dates as a simple line graph. I am using matplotlib.

Here's some sample code.

import matplotlib.pyplot as plt

xticks=['Jan','Feb','Mar','April','May']
x=[1,2,3,4,5]
yticks = ['Windy', 'Sunny', 'Rainy', 'Cloudy', 'Snowy']
y=[2,1,3,5,4]

plt.plot(x,y,'bo') #.2,.1,.7,.8
plt.subplots_adjust(left =0.2)

plt.xticks(x,xticks)
plt.yticks(y,yticks)
plt.show()

I want to start the tick labels leaving some space from the origin. So that they don't look very crammed. Should I be using Fixedlocator for this? Also I would like the graph to be a line showing markers for every point like in this example. How can I achieve this?

回答1:

• You can "lift" the graph by setting a lower ylim with ax.set_ylim.
• Marker dots can be added to the plot using the marker = 'o' parameter setting in the call to plt.plot:

---

import matplotlib.pyplot as plt
fig = plt.figure()
ax = fig.add_subplot(1, 1, 1)

xticks=['Jan','Feb','Mar','April','May']
x=[1,2,3,4,5]
yticks = ['Windy', 'Sunny', 'Rainy', 'Cloudy', 'Snowy']
y=[2,1,3,5,4]

plt.plot(x,y,'b-', marker = 'o') #.2,.1,.7,.8
plt.subplots_adjust(left =0.2)

plt.xticks(x,xticks)
plt.yticks(y,yticks)
ax.set_ylim(0.5,max(y))
plt.show()

来源：https://stackoverflow.com/questions/8920436/matplotlib-how-to-start-ticks-leaving-space-from-the-axis-origin