Q. If I want to save a plot to a PDF file, which of the following is a correct way of doing that?
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(A)
Construct the plot on the screen device and then copy it to a PDF file with dev.copy2pdf()
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(B)
Construct the plot on the PNG device with png(), then copy it to a PDF with dev.copy2pdf()
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(C)
Open the PostScript device with postscript(), construct the plot, then close the device with dev.off()
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(D)
Open the screen device with quartz(), construct the plot, and then close the device with dev.off()
✅ Correct Answer: (A)
Construct the plot on the screen device and then copy it to a PDF file with dev.copy2pdf()