我对此图有问题:
[![在此处输入图片描述] [1]] [1]
y轴以单位为单位,但我需要以百万为单位:
[![在此处输入图片描述] [2]] [2]
您知道实现此目标的方法吗?预先感谢。
您可以使用这样的自定义FuncFormatter:
from matplotlib.ticker import FuncFormatter
import matplotlib.pyplot as plt
def millions(x, pos):
'The two args are the value and tick position'
return '%1.1fM' % (x * 1e-6)
formatter = FuncFormatter(millions)
fig, ax = plt.subplots()
ax.yaxis.set_major_formatter(formatter)
或者您甚至可以用以下功能替换数百万个以支持所有大小:
def human_format(num, pos):
magnitude = 0
while abs(num) >= 1000:
magnitude += 1
num /= 1000.0
# add more suffixes if you need them
return '%.2f%s' % (num, ['', 'K', 'M', 'G', 'T', 'P'][magnitude])
您可以使用FuncFormatter
:
FuncFormatter
from matplotlib import pyplot as plt
from matplotlib.ticker import FuncFormatter
def millions_formatter(x, pos):
return f'{x / 1000000}'
fig, ax = plt.subplots()
ax.plot([1, 2], [1000000, 5000000])
ax.yaxis.set_major_formatter(FuncFormatter(millions_formatter))
ax.set_ylabel('value (in millions)')
plt.show()
import pandas as pd
import matplotlib .pyplot as plt
import matplotlib.ticker as ticker
fig, ax=plt.subplots()
ax.plot([1, 2], [1000000, 5000000])
scale_y = 1e6
ticks_y = ticker.FuncFormatter(lambda x, pos: '{0:g}'.format(x/scale_y))
ax.yaxis.set_major_formatter(ticks_y)
ax.set_ylabel('val in millions')