Question

我正在使用matplotlib绘制电流。我想使用EngFormatter格式化y轴。

yformatter = mtick.EngFormatter(unit="A")
ax.yaxis.set_major_formatter(yformatter)

当电流在微安范围内并且EngFormatter必须绘制µ时，如果使用tex，则会产生错误。

mpl.rc("text", usetex=True)

这是相关的回溯：

~\AppData\Local\Continuum\anaconda3\lib\site-packages\matplotlib\texmanager.py in get_text_width_height_descent(self, tex, fontsize, renderer)
    600         else:
    601             # use dviread. It sometimes returns a wrong descent.
--> 602             dvifile = self.make_dvi(tex, fontsize)
    603             with dviread.Dvi(dvifile, 72 * dpi_fraction) as dvi:
    604                 page = next(iter(dvi))

~\AppData\Local\Continuum\anaconda3\lib\site-packages\matplotlib\texmanager.py in make_dvi(self, tex, fontsize)
    383 
    384         if DEBUG or not os.path.exists(dvifile):
--> 385             texfile = self.make_tex(tex, fontsize)
    386             command = [str("latex"), "-interaction=nonstopmode",
    387                        os.path.basename(texfile)]

~\AppData\Local\Continuum\anaconda3\lib\site-packages\matplotlib\texmanager.py in make_tex(self, tex, fontsize)
    298             else:
    299                 try:
--> 300                     fh.write(s.encode('ascii'))
    301                 except UnicodeEncodeError as err:
    302                     mpl.verbose.report("You are using unicode and latex, but "

UnicodeEncodeError: 'ascii' codec can't encode character '\u03bc' in position 234: ordinal not in range(128)

此错误是否有解决方法？

Answer 1

如果您从texmanager.py阅读了完整的摘录，则会发现：

if rcParams['text.latex.unicode']:
    fh.write(s.encode('utf8'))
else:
    try:
        fh.write(s.encode('ascii'))
    except UnicodeEncodeError as err:
        _log.info("You are using unicode and latex, but have not "
                  "enabled the 'text.latex.unicode' rcParam.")
        raise

您应该看到它们被程序记录的相同。如果您阅读the documentation，它会告诉您相同的解决方案：启用text.latex.unicode。

matplotlib.rcParams['text.latex.unicode'] = True

使用TeX时EngFormatter中的错误

1 个答案: