When I include pgf generated by Matplotlib into latex document. I got the error of
Undefined control sequence. \mathdefault
Which is used by matplotlib. What’s the best way to solve this issue? Do I just include
\newcommand{\mathdefault}[1][]{}
in my Latex file? I’m reluctant to doing so as I don’t see any mentioning of this requirement. I followed several tutorials on including a matplotlib pgf in latex. They all don’t include this newcommand def and have the same issue. But the writers seem not to notice it. Have I done something silly or there is some breaking change in matplotlib lately?