r - Same code different plot in qplot vs ggplot -


i different results, code should equivalent?

qplot(x = price, data = diamonds) + facet_wrap(~cut)

vs

ggplot(aes(x = diamonds$price), data = diamonds) + geom_histogram()  + facet_wrap(~cut)

try instead 

ggplot(aes(x = price), data = diamonds) + geom_histogram()  + facet_wrap(~cut)

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