我有这个代码:
from pylab import *
from mpl_toolkits.axes_grid.anchored_artists import AnchoredText
import numpy as np
import matplotlib.pylab as plt
fig = plt.figure()
ax = fig.add_subplot(111)
ann = AnchoredText('If you zoom in or out, i stay here\nbut can you update this text?',
prop=dict(size=8), frameon=True,
loc=2,
)
ann.patch.set_boxstyle("round,pad=0.,rounding_size=0.2")
ax.add_artist(ann)
delta = 0.025
x = np.arange(-3.0, 3.0, delta)
y = np.arange(-2.0, 2.0, delta)
X, Y = np.meshgrid(x, y)
Z1 = bivariate_normal(X, Y, 1.0, 1.0, 0.0, 0.0)
Z2 = bivariate_normal(X, Y, 1.5, 0.5, 1, 1)
Z = (Z1 - Z2) * 10
plt.contourf(X, Y, Z)
plt.show()
有没有办法将文本锚定为始终可见但也能够使用set_text
文本对象中的方法来更新包含的文本?在这里,我使用了完美锚定的 AnchoredText,但我找不到更改它包含的文本的方法。在AnchoredText Matplotlib 文档中,我找不到这种可用的方法。如果不能用 AnchoredText 完成,可以用简单的文本对象完成吗?
编辑
我接受了David Zwicker的解决方案,这里有一个适用于任何需要它的人的工作示例:
from pylab import *
from mpl_toolkits.axes_grid.anchored_artists import AnchoredText
import numpy as np
import matplotlib.pylab as plt
import random
fig = plt.figure()
ax = fig.add_subplot(111)
ann = AnchoredText('If you zoom in or out, i stay here\nbut can you update this text?$4.1f$ km s$^{-1}$',
prop=dict(size=15), frameon=True,
loc=2,
)
ann.patch.set_boxstyle("round,pad=0.,rounding_size=0.2")
ax.add_artist(ann)
delta = 0.025
x = np.arange(-3.0, 3.0, delta)
y = np.arange(-2.0, 2.0, delta)
X, Y = np.meshgrid(x, y)
Z1 = bivariate_normal(X, Y, 1.0, 1.0, 0.0, 0.0)
Z2 = bivariate_normal(X, Y, 1.5, 0.5, 1, 1)
Z = (Z1 - Z2) * 10
plt.contourf(X, Y, Z)
a = ["hhhhh", "qqqqq", "aaaaaaa","ttttt","yyyyy","oooooooo"]
def setanntext(self):
ann.txt.set_text(random.choice(a))
plt.draw()
buttonax = plt.axes([0.7, 0.05, 0.1, 0.1])
button = Button(buttonax, 'set text',color='0.85', hovercolor='0.95')
button.on_clicked(setanntext)
plt.show()