Matplotlib多个图x轴

Question

我在标记多图表图的X轴时遇到问题。我目前的代码如下：

X=range(0, len(departments), 1)

fig = plt.figure()
ax1 = fig.add_subplot(111)

ax1.bar(X, department_employees_current, color='b')
ax1.bar(X, department_employees_left, color='r', bottom=department_employees_current)
ax1.set_ylabel('Employees current & left')

ax2 = ax1.twinx()
ax2.plot(X, department_percentage_attrition, color='r')
ax2.set_ylabel('% Attrition')

ax2.set_xticklabels(departments)

我将所有X标签轴挤在一起：

Answer 1

您只需设置x刻度的位置以及使用以下设置标签：

ax2.set_xticks(X)

否则matplotlib会尝试将标签放在它自动生成的刻度线上。

包含一些虚假数据的完整示例：

departments = ["Test1","Test2","Test3"]
department_employees_current = [80,800,300]
department_employees_left = [20,100,80]
department_percentage_attrition = [700,50,900]

X=range(0, len(departments), 1)

fig = plt.figure()
ax1 = fig.add_subplot(111)

ax1.bar(X, department_employees_current, color='b')
ax1.bar(X, department_employees_left, color='r', bottom=department_employees_current)
ax1.set_ylabel('Employees current & left')

ax2 = ax1.twinx()
ax2.plot(X, department_percentage_attrition, color='r')
ax2.set_ylabel('% Attrition')

ax2.set_xticks(X)
ax2.set_xticklabels(departments)

plt.show()

会给你所需的情节：