我正在使用楔形图绘制数据(对于补丁/圆形/等也是如此)。 这很好用,但是我想对数绘制数据。
对于普通地块,有
plt.yscale('log')
plt.xscale('log')
但这在这里不起作用,结果为:
ValueError:数据没有正值,因此无法进行日志缩放。
我当然可以将所有数据转换为相应的日志并调整xticks和yticks,但是我想知道是否有matplotlib自动化的方法。
请在下面查看我的代码的工作部分:
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()
感谢您的帮助!
答案 0 :(得分:2)
该错误是由您的x和y限制引起的。选择大于0的值,一切都会好起来。
调整后的代码:
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()
结果: