使用 matplotlib 删除散点图中的一个点 [英] Removing a dot in a scatter plot with matplotlib

问题描述

下面的代码创建了一个带有白点的散点图.如何在不重绘整个图形的情况下删除该点?

The below code creates a scatter plot with a white dot. How can I remove this dot without redrawing the whole figure?

g = Figure(figsize=(5,4), dpi=60);
b = g.add_subplot(111)
b.plot(x,y,'bo') # creates a blue dot
b.plot(x,y,'wo') # ovverrides the blue dot with a white dot (but the black circle around it remains)

推荐答案

过度绘图与删除不同.在第二个绘图调用中，您绘制一个带有黑色边框的白色标记.您可以使用 plot(x,y,'wo', mec='w') 设置标记的边缘颜色.

Overplotting is not the same as removing. With your second plot call you draw a white marker, with a black border. You can set the edgecolor for a marker with plot(x,y,'wo', mec='w').

但是如果你真的想移除它，捕获返回的线对象，并调用它的remove方法.

But if you really want to remove it, capture the returned line object, and call its remove method.

fig, ax = plt.subplots(subplot_kw={'xlim': [0,1],
                                   'ylim': [0,1]})


p1, = ax.plot(0.5, 0.5, 'bo') # creates a blue dot
p2, = ax.plot(0.5, 0.5, 'ro')

p2.remove()

上面的示例生成带有蓝色标记的图形.添加了一个红色标记(在前面)，但又被删除了.

The example above results in a figure with a blue marker. A red marker is added (in front) but also removed again.

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