问题
I know how to change the dpi of a plot when knitting a rmarkdown notebook to html. However is there a way to change the dpi of a plot generated in a rmarkdown notebook without having to knit the document, id est the plot is shown as inline output between two code chunks while working on the notebook?
来源：https://stackoverflow.com/questions/53884985/how-can-i-change-dpi-inline-code-output-in-notebook-rmarkdown