我根据训练集中每个类别的频率创建了以下直方图

每个类别的标签太长，类似于

Speed limit (20km/h)

我可以将每个标签放在条形上吗？

回答：

也许像这样？

import numpy as npimport matplotlib.pyplot as pltN=5xlabel = ["Speed limit ("+str(i)+"km/h)" for i in range(0,N)]xs = np.arange(0,7,1.5)ys = [8,6,10,7,9]width = 0.3*np.ones(N)fig, ax = plt.subplots()bars = ax.bar(xs, ys, width, color='k',alpha=0.3)plt.xticks(xs, xlabel,rotation=270)for i,bar in enumerate(bars):    height = bar.get_height()    ax.text(bar.get_x() + bar.get_width()/2., 0.1*height,                '%s' % xlabel[i],rotation=90,ha='center', va='bottom')plt.show()

将其更改为水平条形图：

import numpy as npimport matplotlib.pyplot as pltN = 5xlabel = ["Speed limit ("+str(i)+"km/h)" for i in range(0,5)]xs = np.arange(0,5)/2ys = [8,6,10,7,9]width = 0.3*np.ones(N)fig, ax = plt.subplots()bars = ax.barh(xs, ys, width, color='k',alpha=0.3)plt.xticks([])for i,bar in enumerate(bars):    height = bar.get_height()    ax.text(bar.get_x()+3, bar.get_y()+bar.get_height()/3,                '%s' % xlabel[i],rotation=0,ha='center', va='bottom')plt.tight_layout()plt.show()