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[英]Merge two plots into one with logarithmic scale - different data frames pandas
[英]Is there an easy way to use logarithmic scale on matplotlib plots displaying data via a custom function (wedge)?
我正在使用楔子繪制數據(同樣適用於補丁/圓形/等)。 這很好用,但是我想對數繪制數據。
對於普通地塊,有
plt.yscale('log')
plt.xscale('log')
但這在這里不起作用,結果是:
ValueError:數據沒有正值,因此無法進行日志縮放。
我當然可以將所有數據轉換為相應地記錄和調整xticks和yticks,但是我想知道是否有matplotlib自動化的方法。
請參閱以下代碼的工作部分:
import matplotlib.pylot as plt
from matplotlib.patches import Wedge
import seaborn as sns
import numpy as np
from matplotlib.patches import Wedge
def dual_half_circle(center, radius, angle=0, ax=None, colors=('w','k'),
**kwargs):
"""
Add two half circles to the axes *ax* (or the current axes) with the
specified facecolors *colors* rotated at *angle* (in degrees).
"""
if ax is None:
ax = plt.gca()
theta1, theta2 = angle, angle + 180
w1 = Wedge(center, radius, theta1, theta2, fc=colors[0], **kwargs)
w2 = Wedge(center, radius, theta2, theta1, fc=colors[1], **kwargs)
for wedge in [w1, w2]:
ax.add_artist(wedge)
return [w1, w2]
fig, ax = plt.subplots(figsize=(30,15))
for i in range(10):
dual_half_circle((100*i, 100*i), radius=10, angle=90, ax=ax,colors=('r','b'))
plt.xlim(0,1000)
plt.ylim(0,1000)
plt.show()
謝謝你的幫助!
該錯誤是由您的x和y限制引起的。 選擇一個大於0的值,一切都會好起來。
調整后的代碼:
import matplotlib.pyplot as plt
from matplotlib.patches import Wedge
def dual_half_circle(center, radius, angle=0, ax=None, colors=('w','k'),
**kwargs):
"""
Add two half circles to the axes *ax* (or the current axes) with the
specified facecolors *colors* rotated at *angle* (in degrees).
"""
if ax is None:
ax = plt.gca()
theta1, theta2 = angle, angle + 180
w1 = Wedge(center, radius, theta1, theta2, fc=colors[0], **kwargs)
w2 = Wedge(center, radius, theta2, theta1, fc=colors[1], **kwargs)
for wedge in [w1, w2]:
ax.add_artist(wedge)
return [w1, w2]
_, ax = plt.subplots(figsize=(30, 15))
for i in range(10):
dual_half_circle((100*i, 100*i), radius=10, angle=90, ax=ax,colors=('r', 'b'))
plt.xlim(1, 1000)
plt.ylim(1, 1000)
plt.xscale('log')
plt.yscale('log')
plt.show()
結果:
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