我正在使用Matplotlib / Python从数据库中绘制数据(计数)。我不知道如何制作动画图例。我希望图例显示行的当前值。
代码是:
def db_count():
### Connect to db and run query ...
return count
x_data, y_data = [], []
figure = plt.figure()
count = db_count()
line, = plt.plot_date(x_data, y_data, '-', label=count)
def update(frame):
x_data.append(datetime.now())
count = db_count()
y_data.append(count)
line.set_data(x_data, y_data)
figure.gca().autoscale_view()
figure.gca().relim()
return line,
animation = FuncAnimation(figure, update, interval=60000)
plt.xlabel('Time')
plt.ylabel('Counts')
plt.title('Total counts')
plt.legend(bbox_to_anchor=(1.05, 0.05))
plt.gcf().autofmt_xdate()
plt.xticks(rotation=45)
plt.show()
谢谢
最佳答案
您需要使用update
在line.set_label(count)
函数中设置行的标签,然后调用plt.legend()
:
def db_count():
### Connect to db and run query ...
return count
x_data, y_data = [], []
figure = plt.figure()
count = db_count()
line, = plt.plot_date(x_data, y_data, '-', label=count)
def update(frame):
x_data.append(datetime.now())
count = db_count()
y_data.append(count)
line.set_data(x_data, y_data)
line.set_label(count) # set the label and draw the legend
plt.legend(bbox_to_anchor=(1.05, 0.05))
figure.gca().autoscale_view()
figure.gca().relim()
return line,
animation = FuncAnimation(figure, update, interval=60000)
plt.xlabel('Time')
plt.ylabel('Counts')
plt.title('Total counts')
plt.gcf().autofmt_xdate()
plt.xticks(rotation=45)
plt.show()
关于python - 如何在python动画中添加图例标签,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/51999396/