[已解决]matplotlib的x轴

Astray.R

a = [66.5, 70.19, 67.35, 67.35, 67.38, 63.9, 61.14, 62.98, 61.84, 63.25, 63.4]
b = [14.39, 15.08 ,16.97, 17.58, 18.05, 18.17, 18.66, 18.81, 20.44, 20.24 ,20.35]
c = ['2020-07-12', '2020-07-13', '2020-07-14', '2020-07-15', '2020-07-16', '2020-07-17', '2020-07-18', '2020-07-19', '2020-07-20', '2020-07-21', '2020-07-22']
fig, ax1 = plt.subplots()
ax2 = ax1.twinx()
ax1.plot(c, a, 'g-')
ax2.plot(c, b, 'b-')
ax1.set_xlabel('X data')
ax1.set_ylabel('Y1,color=g',fontsize=15)
ax2.set_ylabel('Y2,color=b',fontsize=15)
ax1.set_xticklabels(c, rotation=45)
plt.show()

假设x轴的数值很多，比如是2020-01-01到2020-07-22，那x轴那肯定会显示的很重复，有什么办法解决这个问题嘛
比如这个例子，我想要每天日期之间存在2天间隔，x轴显示的标记是['2020-07-12', '2020-07-15', , '2020-07-18', '2020-07-20',, '2020-07-22']，类似tick_spacing = 2这种
有什么方法吗？求大神解答

最佳答案

月排行榜 / 总排行榜

xiaosi4081

2020-8-4 14:14:15

import matplotlib.pyplot as plt

a = [66.5, 70.19, 67.35, 67.35, 67.38, 63.9, 61.14, 62.98, 61.84, 63.25, 63.4]
b = [14.39, 15.08 ,16.97, 17.58, 18.05, 18.17, 18.66, 18.81, 20.44, 20.24 ,20.35]
c = ['2020-07-12', '2020-07-13', '2020-07-14', '2020-07-15', '2020-07-16', '2020-07-17', '2020-07-18', '2020-07-19', '2020-07-20', '2020-07-21', '2020-07-22']
new_a = []
for index,i in enumerate(a):
    if index % 3 == 0:
        new_a.append(i)
new_b = []
for index,i in enumerate(b):
    if index % 3 == 0:
        new_b.append(i)
new_c = []
for index,i in enumerate(c):
    if index % 3 == 0:
        new_c.append(i)


fig, ax1 = plt.subplots()
ax2 = ax1.twinx()
ax1.plot(new_c, new_a, 'g-')
ax2.plot(new_c, new_b, 'b-')
ax1.set_xlabel('X data')
ax1.set_ylabel('Y1,color=g',fontsize=15)
ax2.set_ylabel('Y2,color=b',fontsize=15)
ax1.set_xticklabels(new_c, rotation=45)
plt.show()

跳转到最佳答案楼层

xiaosi4081

import matplotlib.pyplot as plt

a = [66.5, 70.19, 67.35, 67.35, 67.38, 63.9, 61.14, 62.98, 61.84, 63.25, 63.4]
b = [14.39, 15.08 ,16.97, 17.58, 18.05, 18.17, 18.66, 18.81, 20.44, 20.24 ,20.35]
c = ['2020-07-12', '2020-07-13', '2020-07-14', '2020-07-15', '2020-07-16', '2020-07-17', '2020-07-18', '2020-07-19', '2020-07-20', '2020-07-21', '2020-07-22']
new_a = []
for index,i in enumerate(a):
    if index % 3 == 0:
        new_a.append(i)
new_b = []
for index,i in enumerate(b):
    if index % 3 == 0:
        new_b.append(i)
new_c = []
for index,i in enumerate(c):
    if index % 3 == 0:
        new_c.append(i)


fig, ax1 = plt.subplots()
ax2 = ax1.twinx()
ax1.plot(new_c, new_a, 'g-')
ax2.plot(new_c, new_b, 'b-')
ax1.set_xlabel('X data')
ax1.set_ylabel('Y1,color=g',fontsize=15)
ax2.set_ylabel('Y2,color=b',fontsize=15)
ax1.set_xticklabels(new_c, rotation=45)
plt.show()