Matplotlib水平条形图将值添加到条形

Question

使用以下代码：

mixedgenres.sort_values(by = "rating").plot(kind = "barh", color = "steelblue", legend = False, grid = True) 
for i, v in enumerate(mixedgenres.rating):
    plt.text(v + 1, i - 0.25, str(round(v, 2)), color='steelblue')

我得到以下图表：

如何在图形框中包含值并向左对齐，以便将它们很好地彼此排成一行？

以下是示例数据，可帮助您找出：

sampledata = {'genre': ["Drama", "Western", "Horror", "Family", "Music", "Comedy", "Crime", "War"], 
              'rating': [7, 7.6, 8, 8.1, 7.8, 6.9, 7.5, 7.7]}
test = pd.DataFrame(sampledata, index = sampledata["genre"])
test

绘制样本数据

test.sort_values(by = "rating").plot(kind = "barh", color = "steelblue", legend = False, grid = True) 
for i, v in enumerate(test.rating):
    plt.text(v + 1, i - 0.25, str(round(v, 2)), color='steelblue')

结果

Answer 1

这是完整的工作解决方案（跳过导入）。两件事：1）您正在使用 unsorted 评级值进行标记，以及2）您添加了过多的水平偏移/平移。编辑：@ImportanceOfBeingErnest建议的文本的垂直对齐方式

fig = plt.figure()
ax = fig.add_subplot(111)

sampledata = {'genre': ["Drama", "Western", "Horror", "Family", "Music", "Comedy", "Crime", "War"], 
              'rating': [7, 7.6, 8, 8.1, 7.8, 6.9, 7.5, 7.7]}
test = pd.DataFrame(sampledata,  index=sampledata['genre'])
test.sort_values(by = "rating").plot(kind = "barh", color = "steelblue", legend = False, grid = True, ax = ax) 
plt.xlim(0, 8.9)

for i, v in enumerate(sorted(test.rating)):
    plt.text(v+0.2, i, str(round(v, 2)), color='steelblue', va="center")

输出