问题描述
我有以下代码。在没有 Button 小部件的情况下,网格是可见的。但是当我添加按钮时不显示网格时。我做错了什么?
prices Type
name
ResidenceA [1.0,2.0] Condo
ResidenceB [2.0] Apartment
ResidenceC [3.0] Mansion
ResidenceD [4.0] Mansion
解决方法
对我来说,你的代码运行良好! (除了按钮在屏幕中间) 也许您应该尝试以下代码段:
import numpy as np
import matplotlib.pyplot as plt
from matplotlib.widgets import Button
freqs = np.arange(2,20,3)
fig,ax = plt.subplots()
plt.subplots_adjust(bottom=0.2)
t = np.arange(0.0,1.0,0.001)
s = np.sin(2*np.pi*freqs[0]*t)
l,= plt.plot(t,s,lw=2)
class Index:
ind = 0
def next(self,event):
self.ind += 1
i = self.ind % len(freqs)
ydata = np.sin(2*np.pi*freqs[i]*t)
l.set_ydata(ydata)
plt.draw()
def prev(self,event):
self.ind -= 1
i = self.ind % len(freqs)
ydata = np.sin(2*np.pi*freqs[i]*t)
l.set_ydata(ydata)
plt.draw()
callback = Index()
axprev = plt.axes([0.7,0.05,0.1,0.075])
axnext = plt.axes([0.81,0.075])
bnext = Button(axnext,'Next')
bnext.on_clicked(callback.next)
bprev = Button(axprev,'Previous')
bprev.on_clicked(callback.prev)
plt.show()
要阅读有关 matplotlib 按钮的更多信息,请阅读并查看代码段:https://matplotlib.org/stable/gallery/widgets/buttons.html
此外,您可能希望将按钮重命名为更大的名称,例如“TEST”,以避免出现有关标签大小的问题。
,Button() 实例化更改当前轴。所以当我调用 plot.grid()
时,它是在 Button 轴上操作的。我改变了调用 plot.grid()
的顺序并且它起作用了。我已经在下面展示了修改后的代码。
from matplotlib import pyplot as plot
from matplotlib.widgets import Button
plot.plot([1,2,3],[1,3])
# note grid() is called before Button
plot.grid()
ax = plot.axes([0.5,0.5,0.05])
Button(ax,"A",hovercolor="red")
plot.show()