Python：如何增加/减少 x 和 y 刻度标签的字体大小？
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Python: How to increase/reduce the fontsize of x and y tick labels?
提问by FaCoffee
I seem to have a problem in figuring out how to increase or decrease the fontsizeof both the x and y tick labels while using matplotlib.
我似乎在弄清楚如何fontsize在使用matplotlib.
I am aware that there is the set_xticklabels(labels, fontdict=None, minor=False, **kwargs)function, but I failed to understand how to control the fontsizein it.
我知道有这个set_xticklabels(labels, fontdict=None, minor=False, **kwargs)功能，但我不明白如何控制fontsize它。
I expected something somehow explicit, like
我期待一些明确的东西，比如
title_string=('My Title')
plt.suptitle(title_string, y=1.0, fontsize=17)
but I haven't found anything like that so far. What am I missing?
但到目前为止我还没有找到类似的东西。我错过了什么？
采纳答案by FaCoffee
It is simpler than I thought it would be.
它比我想象的要简单。
To set the font size of the x-axis ticks:
要设置 x 轴刻度的字体大小：
x_ticks=['x tick 1','x tick 2','x tick 3']
ax.set_xticklabels(x_ticks, rotation=0, fontsize=8)
To do it for the y-axis ticks:
要为 y 轴刻度执行此操作：
y_ticks=['y tick 1','y tick 2','y tick 3']
ax.set_yticklabels(y_ticks, rotation=0, fontsize=8)
The arguments rotationand fontsizecan easily control what I was after.
争论rotation和fontsize可以很容易地控制我所追求的。
Reference: http://matplotlib.org/api/axes_api.html
回答by toti08
Use the keyword sizeinstead of fontsize.
使用关键字size而不是fontsize。
回答by tmdavison
You can set the fontsize directly in the call to set_xticklabelsand set_yticklabels(as noted in previous answers). This will only affect one Axesat a time.
您可以直接在对set_xticklabels和的调用中设置字体大小set_yticklabels（如之前的答案中所述）。这一次只会影响一个Axes。
ax.set_xticklabels(x_ticks, rotation=0, fontsize=8)
ax.set_yticklabels(y_ticks, rotation=0, fontsize=8)
You can also set the ticklabelfont size globally (i.e. for all figures/subplots in a script) using rcParams:
您还可以使用以下命令ticklabel全局设置字体大小（即脚本中的所有图形/子图）rcParams：
import matplotlib.pyplot as plt
plt.rc('xtick',labelsize=8)
plt.rc('ytick',labelsize=8)
Or, equivalently:
或者，等效地：
plt.rcParams['xtick.labelsize']=8
plt.rcParams['ytick.labelsize']=8
Finally, if this is a setting that you would like to be set for all your matplotlib plots, you could also set these two rcParamsin your matplotlibrcfile:
最后，如果这是您希望为所有 matplotlib 图设置的设置，您还可以rcParams在matplotlibrc文件中设置这两个：
xtick.labelsize : 8 # fontsize of the x tick labels
ytick.labelsize : 8 # fontsize of the y tick labels
回答by ImportanceOfBeingErnest
One shouldn't use set_yticklabelsto change the fontsize, since this will also set the labels (i.e. it will replace any automatic formatter by a FixedFormatter), which is usually undesired. The easiest is to set the respective tick_params:
不应使用set_yticklabels更改字体大小，因为这也会设置标签（即它将用 a 替换任何自动格式化程序FixedFormatter），这通常是不受欢迎的。最简单的是设置相应的tick_params：
ax.tick_params(axis="x", labelsize=8)
ax.tick_params(axis="y", labelsize=20)
or
或者
ax.tick_params(labelsize=8)
in case both axes shall have the same size.
如果两个轴的尺寸相同。
Of course using the rcParams as in @tmdavison's answeris possible as well.
当然，在@tmdavison 的回答中使用 rcParams也是可能的。
