ordering methods allow you to get and set a
VariableOrder on
a CrunchDataset or on the VariableCatalog that
the dataset contains.
"ordering"(x)
"ordering"(x) <- value
"ordering"(x)
"ordering"(x) <- value
"ordering"(x)
"ordering"(x) <- valueordering returns a VariableOrder object, while
ordering<- sets the VariableOrder in value on x