python中条形图顶部的值

Question

我在 pandas df 中有一个表，其中有 avg_sp 和 count1 作为列。我绘制了一个按范围分组的条形图，还为顶部的值添加了一个 for 循环。

plt.figure(figsize=(12, 6))
df2 = df.groupby(pd.cut(df['avg_sp'], range(0, 110,10))).sum()  ['count1'].plot(kind='bar')
plt.xlabel('avg_sp')
plt.ylabel('browse count')

for p in df2.patches:
    df2.annotate(str(p.get_height()), (p.get_x() * 1.005, p.get_height() * 1.005),rotation=90)

但是我没有得到正确的结果，如下图，它与x轴混合，有什么办法可以把数字调高一点吗？

我添加了 pirsquared 建议的代码，但它只影响顶部栏，其他保持不变。

Answer 1

考虑系列s

s = pd.Series(np.random.randn(10000))
s.hist()

---

from matplotlib docs

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')

ax = s.hist()
for c in ax.containers:
    autolabel(c)

---

与ax.patches 相同的解决方案

ax = s.hist()
for rect in ax.patches:
    height = rect.get_height()
    ax.text(rect.get_x() + rect.get_width()/2., 1.05*height,
            '%d' % int(height),
            ha='center', va='bottom')

---

rotated labels docs

ax = s.hist()
for rect in ax.patches:
    height = rect.get_height()
    ax.text(rect.get_x() + rect.get_width()/2., 1.05*height,
            '%d' % int(height),
            ha='center', va='bottom', rotation=90)

---

我稍微弄乱了高度设置以将其放置在我想要的位置

ax = s.hist()
for rect in ax.patches:
    height = rect.get_height()
    ax.text(rect.get_x() + rect.get_width()/2., 1.01*height+100,
            '%d' % int(height),
            ha='center', va='bottom', rotation=90)