matplotlib - 绘图输出文本为路径，不能被 Inkscape 转换为 LaTeX [英] matplotlib - plot outputs text as paths and cannot be converted to LaTeX by Inkscape

问题描述

我有一个 matplotlib 图，我想将其保存为矢量图形格式，然后在 LaTeX 文档中使用.

I have a matplotlib plot that I would like to save in a vector graphics format to then use in a LaTeX document.

我通常从 matplotlib 保存它，用 Inkscape 打开它并将其保存为 PDF+LaTeX(省略 PDF 中的文本并创建 LaTeX 文件).这也可以通过以下方式实现:

I normally save it from matplotlib, open it with Inkscape and save it as PDF+LaTeX (omit text in PDF and create LaTeX file). This can also be achieved with:

inkscape  -D -z --file=in.pdf --export-pdf=out.pdf --export-latex

但是，对于下面的情节，文本实际上是一系列路径.每个字母都是独立的，导致 Inkscape 无法保存不同的 tex 文件.

However, for the following plot, the text is actually a series of paths. Each letter is separate, resulting in Inkscape not being able to save a different tex file.

为什么在下面的代码中，文本没有呈现为文本，而是呈现为路径?请注意，使用 usetex=True 并没有什么不同.

Why is the text not rendered as text but as paths in the code below? Note that the use of usetex=True does not make a difference.

谢谢.

from scipy.stats import lognorm
from matplotlib import rc

#rc('text', usetex=True)
rc('font', family='Times New Roman')
rc('font', size='20.0')

mu    = 1.7
sigma = 1.1
n, bins, patches = plt.hist(data, bins=10000, facecolor='k', edgecolor='k', 
                            normed=True, alpha=0.3, histtype='stepfilled',
                            label='\noindent Empirical data')
y = lognorm.pdf( bins, sigma, scale=np.exp(mu))
plt.xlim( (0,50) )
plt.plot(bins, y, '-', color='k', linewidth=2, label='\noindent Lognormal curve')
plt.ylim( (0, .15) )
plt.xlabel('my x label')
plt.ylabel('my y label')

plt.grid()
plt.legend()
plt.savefig(os.path.expanduser('~/myfile.svg'))

推荐答案

我遇到了同样的问题并解决了.

I ran into the same problem and fixed it.

http://matplotlib.org/users/customizing.html 中的 matplotlib 文档声明默认值为参数svg.fonttype为'path'，表示导出为svg格式时字符会转换为路径.

The matplotlib documentation in http://matplotlib.org/users/customizing.html states that the default value for the parameter svg.fonttype is 'path', which means that characters will be converted to paths when exporting to svg format.

我需要做的就是在我的脚本中添加以下行:

All I needed to do was add the following line in my script:

matplotlib.rcParams['svg.fonttype'] = 'none'

这样所有字符都正确嵌入，我现在可以在 Inkscape 中编辑文本并将我的图形导出为 pdf+Latex，即一个 pdf 文件和一个包含在我的 tex 文件中的 pdf_tex 文件.

This way all characters are embedded correctly, I can now edit the text in Inkscape and export my figure to pdf+Latex, i.e. a pdf file and a pdf_tex file which I include in my tex file.

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