writing png plots into a pdf file in R

Question

I have to create a bunch of graphs with a lot of data points. So far, I\'ve been doing this by plotting all of them into one pdf-file:

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Answer 1

If the source of the problem is too many points in the plot then you might want to consider using hexagonal binning instead of a regular scatterplot. You can use the hexbin package from bioconductor or the ggplot2 package has hexagonal binning capabilities as well. Either way you will probably get a more meaningful plot as well as smaller file size when creating a pdf file directly.