如何正确地为Pandas Bar Charts提供注释?
我跟随Bar Chart Annotations with Pandas and MPL,但不知怎的,我无法将其变成我自己的代码 - 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)
但我不知道如何将其应用到我的代码中。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,但是我需要在其中或沿着它们显示文本,如我引用的文章中所示, 他/她说,"我对水平条形图非常了解,因为我认为它们更容易阅读,但我知道很多人宁愿在常规条形图中看到这个图表。所以,这是执行此操作的代码;你会注意到为了创建注释而改变了一些东西" *
答案 0 :(得分:2)
您的autolabel
函数似乎需要patches
的列表,只有那些条形图为patches
,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)
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)