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我有這樣的代碼:的Python:如何「錨」的文字是始終可見並set_text方法Matplotlib
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()
有沒有辦法來錨文本總是可見的,但也可以使用set_text
方法就像在文本對象中更新包含文本? 這裏我使用了AnchoredText,它完美地錨定了,但是我找不到一個方法來改變它包含的文本。 在AnchoredText Matplotlib文檔我找不到這種方法可用。 如果不能用AnchoredText完成,可以用一個簡單的文本對象來完成嗎?
編輯
我接受了大衛Zwicker的解決方案,並在這裏了在需要它的任何一個工作示例:
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()