蟒蛇pyplot注释

Question

我目前使用下面的代码使用Python pyplot绘制图表：

plt.plot([row[2] for row in data],[row[1] for row in data], type, marker='o', label=name) 

然而，代替'o'默认标记我想在点标记是在row[1]数据

有人可以解释如何做到这一点？

Answer 1

所以你想注释你的线沿点的y值？每个点使用annotate。例如：

import matplotlib.pyplot as plt 

x = range(10) 
y = range(10) 

fig, ax = plt.subplots() 

# Plot the line connecting the points 
ax.plot(x, y) 

# At each point, plot the y-value with a white box behind it 
for xpoint, ypoint in zip(x, y): 
    ax.annotate('{:.2f}'.format(ypoint), (xpoint,ypoint), ha='center', 
       va='center', bbox=dict(fc='white', ec='none')) 

# Manually tweak the limits so that our labels are inside the axes... 
ax.axis([min(x) - 1, max(x) + 1, min(y) - 1, max(y) + 1]) 
plt.show()