> On 6 Aug 2017, at 03:01, lily li <chocol...@gmail.com> wrote:
> I am using the plot() function, but have a problem. When saving as pdf
> format, the ‰ sign in the x-axis label becomes (...) sign. I prefer to save
> in pdf, as this format has a higher resolution than jpeg or other picture
> formats. Could anyone tell me how to do then? Thanks.

Please, share minimal example. which function do you use to save the plot as 
pdf? ‘pdf' or ‘cairo_pdf’ or something else?

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