Matplotlib直方图标签文本拥挤

Question

我正在matplotlib中制作直方图，每个bin的文本标签相互重叠，如下所示：

我尝试按照another solution

沿x轴旋转标签

GetEnvironmentVariable

但是我收到错误消息cuisine_hist = plt.hist(train.cuisine, bins=100) cuisine_hist.set_xticklabels(rotation=45) plt.show() 。为什么？我该如何解决这个问题？或者，如何“转置”绘图，使标签位于垂直轴上？

Answer 1

plt.hist的返回值不是您用来运行函数set_xticklabels的返回值：

正在运行该功能的是matplotlib.axes._subplots.AxesSubplot，您可以从此处获取：

fig, ax = plt.subplots(1, 1)
cuisine_hist = ax.hist(train.cuisine, bins=100)
ax.set_xticklabels(rotation=45)
plt.show()

从plt.hist的“帮助”中：

Returns
-------
n : array or list of arrays
    The values of the histogram bins. See *normed* or *density*

bins : array
    The edges of the bins. ...

patches : list or list of lists
   ...

Answer 2

您在这里。我将两个答案集中在一个示例中：

# create figure and ax objects, it is a good practice to always start with this
fig, ax = plt.subplots()

# then plot histogram using axis
# note that you can change orientation using keyword
ax.hist(np.random.rand(100), bins=10, orientation="horizontal")

# get_xticklabels() actually gets you an iterable, so you need to rotate each label
for tick in ax.get_xticklabels():
    tick.set_rotation(45)

它产生带有旋转x线和水平直方图的图形。

Answer 3

This可能会有所帮助，因为它与旋转标签有关。

import matplotlib.pyplot as plt


x = [1, 2, 3, 4]
y = [1, 4, 9, 6]
labels = ['Frogs', 'Hogs', 'Bogs', 'Slogs']

plt.plot(x, y, 'ro')
# You can specify a rotation for the tick labels in degrees or with keywords.
plt.xticks(x, labels, rotation='vertical')
# Pad margins so that markers don't get clipped by the axes
plt.margins(0.2)
# Tweak spacing to prevent clipping of tick-labels
plt.subplots_adjust(bottom=0.15)
plt.show()

所以我认为

plt.xticks(x, labels, rotation='vertical')

在这里很重要。