熊猫,条形图注释

2019年7月20日 234次阅读

如何正确地给Pandas Bar Charts注释？

我跟着Bar Chart Annotations with Pandas and MPL,但不知怎的,我不能把它变成我自己的代码 – this is as far as I can go.怎么了？

我还发现了以下代码from here：

def autolabel(rects):
    # attach some text labels
    for rect in rects:
        height = rect.get_height()
        ax.text(rect.get_x() + rect.get_width()/2., 1.05*height,
                '%d' % int(height),
                ha='center', va='bottom')

autolabel(rects1)
autolabel(rects2)

但我不知道如何将它应用于我的代码.请帮忙.

更新：

谢谢@CT朱,答案.但是,在水平条中,您仍然将文本放在条形图的顶部,但我需要在其中或沿着它们显示文本,就像我引用的文章中所示,

《熊猫,条形图注释》

他/她说的地方,

“I am very parital to horizontal bar charts, as I really think they are easier to read, however, I understand that a lot of people would rather see this chart implemented in a regular bar chart. So, here is the code to do that; you will notice that a few things have changed in order to create the annotation”*

最佳答案 看来你的autolabel函数正在期待一个补丁列表,假设你的情节只有那些条形作为它的补丁,我们可以这样做：

df = pd.DataFrame({'score':np.random.randn(6),
                   'person':[x*3 for x in list('ABCDEF')]})

def autolabel(rects):
    x_pos = [rect.get_x() + rect.get_width()/2. for rect in rects]
    y_pos = [rect.get_y() + 1.05*rect.get_height() for rect in rects]
    #if height constant: hbars, vbars otherwise
    if (np.diff([plt.getp(item, 'width') for item in rects])==0).all():
        scores = [plt.getp(item, 'height') for item in rects]
    else:
        scores = [plt.getp(item, 'width') for item in rects]
    # attach some text labels
    for rect, x, y, s in zip(rects, x_pos, y_pos, scores):
        ax.text(x, 
                y,
                '%s'%s,
                ha='center', va='bottom')

ax = df.set_index(['person']).plot(kind='barh', figsize=(10,7), 
              color=['dodgerblue', 'slategray'], fontsize=13)

ax.set_alpha(0.8)
ax.set_title("BarH")#,fontsize=18)
autolabel(ax.patches)

《熊猫,条形图注释》

ax = df.set_index(['person']).plot(kind='bar', figsize=(10,7), 
              color=['dodgerblue', 'slategray'], fontsize=13)

ax.set_alpha(0.8)
ax.set_title("Bar")#,fontsize=18)
autolabel(ax.patches)

《熊猫,条形图注释》

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