# sorting examples using the mtcars dataset
attach(mtcars)
# sort by mpg
newdata <- mtcars[order(mpg),]
# sort by mpg and cyl
newdata <- mtcars[order(mpg, cyl),]
#sort by mpg (ascending) and cyl (descending)
newdata <- mtcars[order(mpg, -cyl),]
detach(mtcars)
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newdata <- mtcars[order(mtcars$mpg),]
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dd[with(dd, order(-z, b)), ]
## sort by column Z and B ==============================