Python Matplotlib 图表在 PyCharm 中不显示
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Matplotlib chart does not display in PyCharm
提问by william007
I run the following code in PyCharm 3.4.1, and it highlighted %matplotlib inlineshowing syntax error, and I delete the first line, and run, I expect it will prompt me some charts, but it runs normally with Process finished with exit code 0， and no charts is showing.
我在PyCharm 3.4.1中运行以下代码，高亮%matplotlib inline显示语法错误，我删除第一行，然后运行，我期望它会提示我一些图表，但它运行正常Process finished with exit code 0，并且没有图表显示。
My question is:
1. What is %matplotlib inlineuse for;
2. How to let pycharm shows matplotlib chart?
我的问题是： 1. 有什么%matplotlib inline用；2.如何让pycharm显示matplotlib图表？
%matplotlib inline
from IPython.core.pylabtools import figsize
import numpy as np
from matplotlib import pyplot as plt
figsize(11, 9)
import scipy.stats as stats
dist = stats.beta
n_trials = [0, 1, 2, 3, 4, 5, 8, 15, 50, 500]
data = stats.bernoulli.rvs(0.5, size=n_trials[-1])
x = np.linspace(0, 1, 100)
# For the already prepared, I'm using Binomial's conj. prior.
for k, N in enumerate(n_trials):
sx = plt.subplot(len(n_trials) / 2, 2, k + 1)
plt.xlabel("$p$, probability of heads") \
if k in [0, len(n_trials) - 1] else None
plt.setp(sx.get_yticklabels(), visible=False)
heads = data[:N].sum()
y = dist.pdf(x, 1 + heads, 1 + N - heads)
plt.plot(x, y, label="observe %d tosses,\n %d heads" % (N, heads))
plt.fill_between(x, 0, y, color="#348ABD", alpha=0.4)
plt.vlines(0.5, 0, 4, color="k", linestyles="--", lw=1)
leg = plt.legend()
leg.get_frame().set_alpha(0.4)
plt.autoscale(tight=True)
plt.suptitle("Bayesian updating of posterior probabilities",
y=1.02,
fontsize=14)
plt.tight_layout()
采纳答案by Gabriel
The %notation is for magic functions. The particular magic function and argument you reference, %matplotlib inline, is meant for an IPython notebooksession. You will get a syntax error using magic functions in a normal python session.
该%符号用于魔术函数。您引用的特定魔术函数和参数%matplotlib inline，适用于IPython 笔记本会话。在正常的 Python 会话中使用魔法函数会出现语法错误。
The %matplotlibmagic function is meant to specify a backend for matplotlib and the argument inlinewill produce an error if you are not in an IPython notebook session.
在%matplotlib神奇的功能是为了指定matplotlib后端和参数inline，如果你不是在IPython的笔记本会议将产生一个错误。
To show your plot you should use plt.showfor an interactive window or plt.savefigto save it to file. For example,
要显示您的绘图，您应该将其plt.show用于交互式窗口或plt.savefig将其保存到文件中。例如，
plt.show()
or
或者
plt.savefig( 'myfig.png' )
回答by vinSan
plot show with some value, helped in providing the window where I was able to see the image. By default the interactive mode was false. I neeed to turn on the interactive mode.
plt.interactive(True)
绘图显示具有一些价值，有助于提供我能够看到图像的窗口。默认情况下，交互模式为 false。我需要打开交互模式。
plt.interactive(True)
Add the plt.show command after plotting the graph.
绘制图形后添加 plt.show 命令。
plt.show(10)
回答by Jerald Cogswell
I got my plot to show by selecting Edit Configurations... and under Execution, check the box Run with Python console. I just used plt.tight_layout(). I was not in a Notebook.
我通过选择 Edit Configurations... 并在 Execution 下选中 Run with Python console 框来显示我的图。我只是使用 plt.tight_layout()。我不在笔记本中。
