R: Not able to save the plot -


this question has answer here:

i generating plot able see in rmarkdown output whenever trying save it, getting blank(white) image. adding following 2 lines before , after plot

png("output.png") #plot code dev.off()

it working. , stopped working. can me on this??

edit

when pdf

pdf("output.pdf") #plot code dev.off()

i getting error as: 

there error opening document. document cannot opened because has no pages.

thanks.

from comments gather right, need print resulting ggplot2 object in order show plot, see r faq 7.22.


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