I'm trying to animate a box plot as data shifts over a time series.
I'm working off the matplotlib animate examples, which show how it works with the plot function, but that doesn't seem to carry over for a boxplot function:
Code Works below, but changing the two lines to box plot gives me errors
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.animation as animation
fig, ax = plt.subplots()
line, = ax.plot(np.arange(10)) # <-- ax.boxplot(np.arange(10))
ax.set_ylim(0, 20)
def update(data):
line.set_ydata(data) # < -- line = ax.boxplot(data)?
return line,
def data_gen():
i = 0
while True:
yield np.arange(10) + i
i += .1
ani = animation.FuncAnimation(fig, update, data_gen, interval=100)
plt.show()
Boxplot also doesn't seem to have a "set_data" function, or an "animated=True" parameter.
Essentially I'd like the animation to work the same as above, but depicting a box plot instead of a line plot.
I figured it out myself: The idea can be to clear the axes, and in each frame draw a new boxplot as shown below.
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.animation as animation
fig, ax = plt.subplots()
# line, = ax.boxplot(np.arange(10)) <-- not needed it seems
ax.set_ylim(0, 20)
def update(data):
ax.cla() # <-- clear the subplot otherwise boxplot shows previous frame
ax.set_ylim(0, 20)
ax.boxplot(x=data)
def data_gen():
i = 0
while True:
yield np.arange(10) + i
i += .1
ani = animation.FuncAnimation(fig, update, data_gen, interval=100)
plt.show()
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