Cannot generate scatterplot in R. Printing plot returns NULL -

unable generate scatterplot, code:

png(file = "monthvsuniquecode.png")  p1<-plot(x = month_uc$new.col,y = month_uc$uniquecode,       xlab = "month",      ylab = "uniquecode",      main = "month vs uniquecode" ) dev.off()  print(p1) 

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printing plot returns null.

print(p1) null

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my month_uc dataframe has 56003 rows , 2 columns (uniquecode int, month char)

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note: i've learnt r 4 hours back. doing wrong?

i believe basic plotting functions not allow plots assigned objects. can do:

png(file = "monthvsuniquecode.png") plot(x = month_uc$new.col,      y = month_uc$uniquecode,      xlab = "month",      ylab = "uniquecode",      main = "month vs uniquecode" ) dev.off() 

to save png. or just:

plot(x = month_uc$new.col,      y = month_uc$uniquecode,      xlab = "month",      ylab = "uniquecode",      main = "month vs uniquecode" ) 

to display it.