Description Usage Arguments Value
Author: Kevin Wright
http://tolstoy.newcastle.edu.au/R/help/04/09/4300.html
Some ideas from Andy Liaw
http://tolstoy.newcastle.edu.au/R/help/04/07/1076.html
Use + for ascending, - for decending.
Sorting is left to right in the formula
Useage is either of the following:
sort.data.frame(~Block-Variety,Oats)
sort.data.frame(Oats,~-Variety+Block)
| 1 | sort_data_frame(form, dat)
 | 
| form | A Formula. See example in Description. | 
| dat | Data frame to be ordered. | 
Ordered data frame.
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